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Unveiling the Generic and Specific Epithets

The world of botany is rich with diverse forms and species, making the classification and identification of plants both a fascinating and complex task. Central to this endeavor is the system of binomial nomenclature, a universally accepted method for naming organisms that was devised by Carl Linnaeus in the 18th century. This system, which employs two Latin names to identify each species, is crucial for ensuring clarity and consistency in the botanical world.

The Basics of Binomial Nomenclature

Binomial nomenclature involves the use of two names: the generic (genus) and the specific (species) epithet. The genus name is always capitalized, while the species name is written in lowercase and italicized. For instance, in Eriogonum fasciculatum, Eriogonum represents the genus, and fasciculatum the species. This two-part naming system not only aids in the precise identification of plants but also reflects their evolutionary relationships.

Generic and Specific Epithets

The generic epithet denotes the broader category to which a plant belongs, grouping together species that share certain structural characteristics. The specific epithet, on the other hand, distinguishes individual species within the genus based on unique traits. This combination of names provides a detailed and organized way to catalog the vast diversity of the plant kingdom.

 

In addition to the basic binomial name, cultivars come into play. A cultivar, short for ‘cultivated variety,’ is a plant variety that has been produced in cultivation by selective breeding. Cultivar names are appended to the binomial name and are often enclosed in single quotation marks, such as Salvia greggii ‘Furman’s Red’. This naming convention helps in identifying plants that have been specifically bred for particular characteristics, such as fruit color, flower form, or disease resistance.

Challenges of Morphology-Based Naming

Traditionally, plants were classified based on their morphology, which involves the observable physical characteristics like shape, structure, color, and size. While this method is straightforward, it can often lead to misidentifications and inconsistencies. Morphology can be influenced by environmental factors, leading to significant variation within a single species. This makes it difficult to accurately categorize plants solely on their appearance.

 

For example, plants within the same genus can exhibit vastly different morphologies. Take the genus Senecio from the Asteraceae family. Some species of Senecio look remarkably similar to daisies, with their iconic yellow or white ray flowers. Others, however, are succulent and bear a striking resemblance to cacti, with thick, fleshy leaves adapted to arid environments. Despite their different appearances, these species are genetically related and belong to the same genus. This highlights the limitations of morphology-based classification.

The Genetic Revolution in Plant Classification

Advancements in genetic research have revolutionized the way we classify plants. By analyzing DNA sequences, botanists can uncover evolutionary relationships that are not apparent through morphology alone. This method, known as molecular phylogenetics, allows for a more accurate and reliable classification of plants based on their genetic makeup.

 

Genetic analysis has revealed that plants which may look very different can indeed be closely related. In the case of Senecio, genetic studies have confirmed that both the daisy-like and cactus-like species share a common ancestry and belong to the same genus. This genetic approach not only clarifies the relationships between different species but also helps in identifying new species that were previously misclassified due to their morphological differences.

The Importance of Accurate Plant Naming

Binomial nomenclature is a fundamental tool in the field of botany, providing a structured and consistent way to name and classify plants. Accurate naming not only benefits scientists but also has practical applications for home gardeners. Understanding the precise names of plants can help gardeners make informed decisions about plant care, pest control, and landscape design. For instance, by knowing the specific species and its characteristics, gardeners can choose plants best suited for their climate and soil conditions. Furthermore, it ensures that gardeners can effectively communicate with nurseries and fellow enthusiasts, fostering a shared knowledge and appreciation for the incredible diversity of the plant kingdom.

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King penguins can often find giant squid…

As a light-hearted tip to cap off your botanical journey, remember that you can use the mnemonic device “King penguins can often find giant squid” to recall the taxonomic hierarchy: Kingdom, Phylum, Class, Order, Family, Genus, and Species.

Just imagine those regal penguins embarking on an adventurous deep-sea hunt, and you’ll never forget the order of classification again!

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As stewards of the environment, Uncommon Gardens is committed to creating sustainable and regenerative landscapes that harmonize with nature. We draw inspiration from ReScape, a nonprofit organization advocating for whole-systems regenerative approaches to landscaping. Let’s delve into ReScape’s eight principles and explore how Uncommon Gardens is weaving them into our design ethos.

1. Act Local Resources

At Uncommon Gardens, we recognize the importance of sourcing materials locally. By collaborating with nearby nurseries and suppliers, we reduce transportation emissions and support our community. Our plant selections are tailored to thrive in our specific climate, ensuring resilience and longevity.

2. Reduce Waste Resources

Waste reduction is at the core of our practices. Uncommon Gardens minimizes green waste by composting organic matter and reusing materials whenever possible. Our commitment to sustainable hardscaping materials and efficient irrigation systems further reduces waste.

3. Nurture Soil Resources

Healthy soil is the foundation of any thriving landscape. We prioritize soil health through organic amendments, cover cropping, and minimal disturbance during installation. By fostering robust soil ecosystems, we enhance plant vitality and water retention.

4. Sequester Carbon Resources

Uncommon Gardens actively participates in carbon sequestration. Our choice of native trees and shrubs contributes to carbon storage. Additionally, we advocate for homeowners to maintain mature trees, which play a vital role in offsetting carbon emissions.

5. Save Water Resources

Water conservation is non-negotiable. Our designs incorporate drought-tolerant plants, efficient irrigation controllers, and rainwater harvesting systems. Uncommon Gardens educates clients on responsible water usage, promoting a sustainable balance.

6. Conserve Energy Resources

Thoughtful landscape design can significantly impact energy consumption. Uncommon Gardens strategically places shade trees to cool outdoor spaces, reducing the need for air conditioning. We also integrate LED low voltage lighting and energy-efficient fixtures.

7. Protect Water & Air Resources

Our commitment extends beyond aesthetics. Uncommon Gardens avoids harmful pesticides and synthetic fertilizers, safeguarding water quality. We promote native pollinator-friendly plants, enhancing biodiversity and air quality.

8. Create Habitat Resources

Biodiversity thrives in well-designed landscapes. Uncommon Gardens incorporates native plants, birdhouses, and pollinator-friendly features. Our goal is to create havens for wildlife, fostering ecological balance.

Uncommon Gardens in Action

• Native Plant Palettes: We curate plant palettes that celebrate local flora, attracting native birds, butterflies, and beneficial insects.
• Permeable Surfaces: Our hardscapes allow rainwater infiltration, reducing runoff and replenishing groundwater.
• Educational Workshops: Uncommon Gardens hosts workshops on sustainable gardening practices, empowering our clients to be eco-conscious stewards.

In conclusion, Uncommon Gardens aligns with ReScape’s principles to create landscapes that not only beautify but also regenerate our environment. Together, we cultivate spaces that honor nature’s wisdom and inspire a greener future.

For more information about ReScape, visit their website¹. If you’d like to explore our regenerative landscape designs, feel free to reach out to Uncommon Gardens at contact@uncommon-gardens.com.

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Quercus lobata – the Valley Oak:

 Quercus lobata, also known as valley oak or roble oak, is a large deciduous tree native to California. It belongs to the White Oak section of the oak genus. It has distinctive features in its leaves, acorns, and habitat.

Leaves: The leaves of Quercus lobata are dark green on the upper surface and grayish green on the lower surface. They have fine soft hairs on the underside that make them feel velvety. They have 6-10 rounded lobes that vary in size, shape, and depth. The leaves release a forest-like aroma when they are crushed or broken. In autumn, the leaves turn yellow and brown before falling.

Acorns: The acorns of Quercus lobata are conical, brown, and pointed. They are partly enclosed in deep cups that have light brown scales with small bumps or warts.

The acorns are 25-35 mm long and 15-20 mm wide, which is larger than most other oaks. They mature in one year, which is faster than most other Californian oaks. These acorns are moderately sweet and edible, but they need to be leached of their tannins before consumption.

Habitat: Quercus lobata grows in interior valleys and foothills from Siskiyou County to San Diego County in California. It prefers deep soils that have access to groundwater and can tolerate cool wet winters and hot dry summers. It is often found in valley bottoms, floodplains, creeks, and stream terraces that have seasonally saturated soils and may be intermittently flooded. It is the dominant species in both valley oak woodland and valley oak riparian forest ecosystems, where it forms dense stands or mixes with other plants.

Quercus kelloggii – the Black Oak:

Quercus kelloggii, also known as California black oak, is a deciduous tree in the red oak group. It is native to California, where it grows on sunny and windy slopes and ridges with well-drained soils.

Leaves: The leaves have seven lobes and a velvety texture. They are red and soft when they emerge, then turn dark green on the upper side and grayish green on the lower side.

In autumn, they change to yellow-green and orange-brown before falling.

Acorns: The acorns are relatively large compared to other oaks, measuring from 2.5 to 4 centimeters long and 1.5 to 1.8 centimeters wide. They have a slender shape and a reddish brown color. The base of the acorn is enclosed in a cupule, which is a woody structure that holds the acorn.

(note: the kelloggii on our property have not yet started any acorns this year… so the photo above is borrowed from pinterest.)

The cupule is covered with thin scales that are appressed to the surface and smooth or slightly hairy at the tip. The scales are light brown in color and contrast with the darker acorn. The acorns mature about 7 to 8 months after pollination, which is unusual for a red oak, as most red oaks take two years to mature their acorns. These acorns are an important food source for many animals, such as squirrels, woodpeckers, deer, and bear. They are also edible for humans, but they too need to be leached of their tannins before consumption.

Bark and habit: The bark is thin and smooth in young trees, but becomes thick, ridged, plate-like, and blackish in older trees. The bark protects the tree from fire and insects. The tree’s growth habit varies depending on the site and the age of the tree. It may grow as a shrub with multiple stems on poor sites, or as a medium-sized tree with a single trunk and a broad and rounded crown on better sites. The trunk is often forked into two or more branches, and may become hollow in old trees.

Quercus agrifolia – the Coastal Live Oak:

Quercus agrifolia – Coastal Live Oak The Quercus agrifolia is an evergreen tree that belongs to the red oak section (Lobatae) of the oak genus (Quercus). It is closely related to the black oak (Quercus kelloggii), but it has distinctive leaves, acorns, and habit that make it easy to identify.

Leaves: The leaves of the coast live oak are oval, convex, and leathery, resembling holly leaves. They are 2 to 7 centimeters long and 1 to 4 centimeters wide, with smooth edges. The leaf margin has spiny teeth, with sharp fibers that extend from the veins. The leaves are dark green on both sides and stay green throughout the year. The leaves are adapted to the dry and windy conditions of the coastal regions, where they help reduce water loss and protect the tree from salt spray.

Acorns: The acorns of the coast live oak are small and round, 2 to 3.5 centimeters long and 1 to 1.5 centimeters wide. They are reddish brown and have a cupule that covers about a quarter of the nut. The scales of the cupule are smooth to lightly covered with tiny hairs..

This tree on our property has long, oddly curved acorns

The acorns mature in about 7 to 8 months after pollination, which is unusual for a red oak. Most red oaks take 18 months to mature their acorns. The acorns are an important food source for many animals, such as squirrels, woodpeckers, jays, deer, and bears.

Habit: The coast live oak has a branched trunk and can grow up to 25 meters tall. Some trees may live for more than 1,000 years. The trunk is often twisted, thick and gnarled, especially in older trees. The crown is round and dense in young and middle-aged trees, but becomes more open and defined in old trees. The coast live oak grows in a variety of habitats, from coastal hills and valleys to inland mountains and canyons. It is tolerant of drought, fire, and salt spray, but sensitive to sudden oak death, a fungal disease that has killed many oaks in California.

Quercus wislizeni – the Inland Live Oak

 Quercus wislizeni, also known as interior live oak, is another species of oak tree native to California. It too is evergreen, meaning it does not shed its leaves in winter. It grows mainly in the interior valleys and foothills of the state, where it can tolerate dry and rocky soils.

The leaves of Quercus wislizeni are oblong and leathery, with smooth edges and pointed tips. Quercus wislizeni is closely related to Quercus agrifolia, the coast live oak but can be distinguished by their smaller and more oblong leaves. They are glossy green on the upper surface and dull gray-green on the lower surface. The leaves are usually 1 to 3 inches long and 0.5 to 1 inch wide.

The acorns of Quercus wislizeni are small and round, with a diameter of about 0.5 inch. They have a shallow cup that covers less than a quarter of the nut. Compared with the Q. agrifolia they are smaller and more oblong.

 The acorns mature in one year and are dispersed by animals such as squirrels and jays.

The bark of Quercus wislizeni is dark brown or black, with deep furrows and ridges. The trunk can reach up to 3 feet in diameter, and the tree can grow up to 60 feet in height. The branches are often twisted and spreading, forming a dense canopy.

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What is geotextile fabric?

Geotextile fabric, also known as landscape fabric, is a permeable material made of polymer fibers such as polypropylene or polyester. These fibers are processed through various methods such as hot pressing and needling, gluing, and weaving to create a fabric-like structure. Geotextile fabric can endure a wide range of extremities and is long-lasting. 

Geotextile fabric has many applications in civil engineering, construction, agriculture, and landscaping. Its primary purpose is to separate layers of gravel from soil and prevent gravel from sinking into the soil. This helps to maintain the integrity of the soil structure and prevent soil erosion. It is also used to reinforce the soil and provide stability to the ground. Geotextile fabric can also act as a filter, allowing water to pass through while blocking sediments and contaminants. Additionally, certain geotextile fabrics can serve as a moisture barrier, preventing water from seeping into the soil and causing erosion.

Does geotextile fabric stop weeds?

While initially geotextile fabric can help slow the spread and rate of growth of weeds, it is not meant to keep weeds out entirely.

It does not stop vegetation from growing through it. Weeds can still germinate on top of the fabric or penetrate through the pores of the fabric. An added negative of this is that it makes weeding almost impossible as the roots are tied into the fabric and will just regrow after the upper plant is removed.

What are the types of geotextile fabric?

Geotextile fabric comes in two basic forms: woven and non-woven.  

Woven geotextiles: These are made by weaving together individual threads of polypropylene or polyester fibers. They are strong and durable, making them ideal for use in applications that require high strength and stability.  

Non-woven geotextiles:In contrast these fabrics are made by bonding together individual fibers using heat or chemicals. They are more flexible than woven geotextiles, making them ideal for use in applications that require flexibility and conformability.

Both types of geotextiles have their advantages and disadvantages depending on the specific needs and conditions of the project.

Woven geotextiles have higher tensile strength and lower elongation than non-woven geotextiles, meaning they can resist more force and deformation. However, woven geotextiles have lower permeability and porosity than non-woven geotextiles, meaning they allow less water and air to pass through. Non-woven geotextiles have higher permeability and porosity than woven geotextiles, meaning they allow more water and air to pass through. However, non-woven geotextiles have lower tensile strength and higher elongation than woven geotextiles, meaning they can resist less force and deformation.

What are some drawbacks of using geotextile fabric?

Geotextile fabric is not without its drawbacks. One of the main disadvantages of using geotextile fabric is that it is not biodegradable.

Being poly materials, these fabrics last a long time and when they do break down they are difficult to remove and leave microplastics in the soil. This can have negative impacts on the environment and wildlife.

Another disadvantage of using geotextile fabric is that it can interfere with the natural processes of the soil such as nutrient cycling, microbial activity, and organic matter decomposition. This can affect the health and fertility of the soil.

How does weed cloth affect your garden layout?

Weed cloth can negatively affect your garden layout in several ways.

• First, it can make it harder to dig new holes for planting new plants or transplanting existing ones. You will have to cut through the fabric with a sharp tool such as a knife or scissors, which can damage the fabric and create gaps for weeds to grow through. You will also have to remove the excess fabric and dispose of it properly, which can be wasteful and harmful to the environment.
• Second, weed cloth can limit your plant choices and diversity. Some plants may not thrive well with the fabric barrier, especially those that need deep roots or prefer moist soil. The fabric can also prevent beneficial organisms such as earthworms and microbes from reaching the soil and improving its quality. This can affect the health and fertility of the soil and reduce its ability to support a variety of plants.
• Third, weed cloth can reduce your flexibility and creativity in designing your garden. You will have to stick to the original layout that you created when you installed the fabric, which may not suit your changing preferences or needs over time. You will also have less room for experimentation and improvisation, as you will have to plan ahead and cut holes in the fabric for every plant you want to add or move. This can make your garden look rigid and boring, rather than dynamic and lively.

What are some alternatives to weed cloth?

If you want to avoid using weed cloth in your garden or landscape, there are some alternatives that you can try. Some of these alternatives are:

• Mulching: Mulching is covering the soil with organic materials such as wood chips, straw, leaves, grass clippings, or compost. Mulching can help suppress weeds by blocking sunlight and creating a physical barrier. It can also help retain moisture, regulate temperature, add nutrients, and attract beneficial organisms to the soil. Mulching can be done regularly throughout the year to maintain its effectiveness.
• Dense Planting: Dense planting involves filling the space with plants that can outcompete weeds for resources such as light, water, and nutrients. Planting can help create a dense and diverse canopy that can shade out weeds and prevent them from germinating. Planting can also help improve the appearance and function of your garden by adding color, texture, fragrance, and wildlife value. Planting can be done according to your design preferences and needs.
• Weeding: Weeding is manually removing weeds from the soil by pulling them out by hand or using tools such as hoes, trowels, or forks. Weeding can help eliminate weeds before they become established and spread seeds. Weeding can also help prevent weeds from competing with your desired plants for resources and space. Weeding can be done periodically throughout the year to keep your garden clean and tidy.

Conclusion

Geotextile fabric is a versatile material that can be used for a variety of applications such as separation, stabilization, reinforcement, filtration, moisture barrier, and drainage. While it is not meant to keep weeds out entirely, it works great for separating layers of gravel from soil and preventing gravel from sinking into the soil.  

However, geotextile fabric is not effective as a weed barrier. It does not stop vegetation from growing through it. It also has some drawbacks such as being non-biodegradable and affecting the soil quality. Therefore, it is important to understand what geotextile fabric is, how it works, and what its limitations are before using it in your garden or landscape.

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Climate change is one of the most pressing challenges facing humanity and the planet. It is affecting the physical, biological, and social systems that sustain life on Earth. As landscape designers, we have a responsibility and an opportunity to address this challenge through our work. We can create landscapes that are not only beautiful and functional, but also resilient and adaptive to the changing climate.

I just watched a lecture on @Vectorworks “coffee Breaks” with  Adrian McGregor, a landscape architect from Australia, who is one of the pioneers of this approach.

 He defines biourbanism as “cities = nature”, meaning that cities are part of nature and should be designed as ecological systems that are in harmony with the natural environment. He proposes a biourbanism model based on 10 interconnected systems that determine the health, prosperity, and resilience of cities: citizens, governance, economy, culture, health, water, energy, food, waste, and technology.

BIOME/ANTHROME

McGregor uses the term “anthrome’ – meaning a human-engineered biome, or a human-dominated ecosystem. He uses this term to describe cities as part of nature, rather than separate from it. He argues that cities should be designed as ecological systems that are in harmony with the natural environment.

Anthome is a word that combines anthro (human) and biome (ecosystem), and it reflects McGregor’s vision of biourbanism as a new paradigm for urban planning and design in the age of climate change.

What interested me is that McGregor argues that biourbanism is not only relevant for large-scale urban planning and design, but also for smaller residential landscape design projects. He suggests that by applying the principles and strategies of biourbanism to our gardens and backyards, we can contribute to the mitigation and adaptation of climate change at the local level.

Some of the benefits of biourbanism for residential landscape design are:

• It enhances biodiversity and ecosystem services by creating habitats for native plants and animals, improving soil quality, reducing stormwater runoff, filtering air pollutants, sequestering carbon, and providing food and medicine.

• It reduces energy consumption and greenhouse gas emissions by using renewable sources such as solar panels, wind turbines, or biofuels, minimizing artificial lighting and heating/cooling systems, and maximizing natural ventilation and shading.

• It increases water efficiency and security by harvesting rainwater, recycling greywater, installing low-flow fixtures, creating permeable surfaces, and implementing xeriscaping or drought-tolerant landscaping.

• It promotes social cohesion and well-being by creating spaces for recreation, relaxation, education, and community engagement, fostering a sense of place and identity, and enhancing aesthetic and cultural values.

Some Final Thoughts:

Biourbanism is a new paradigm for landscape design in the age of climate change. It offers a holistic and integrated approach that considers the interrelationships between humans and nature, between urban and rural areas, and between local and global scales.

By adopting biourbanism as a guiding principle for our residential landscape design projects, we can create landscapes that are not only beautiful and functional, but also resilient and adaptive to the changing climate.

The post BIOURBANISM: What are the benefits and challenges of applying biourbanism, a new paradigm for landscape design that considers cities as part of nature, to our residential landscape projects? appeared first on Uncommon Gardens.

Ornamental grasses are a popular choice for many gardeners because they are low-maintenance and add texture and interest to any landscape. However, if left untrimmed, they can become an eyesore and detract from the beauty of your garden. Trimming ornamental grasses is an important task that should be done at least once a year to keep them looking their best.

When to Prune Ornamental Grasses

Tools Required

Before you begin trimming your ornamental grasses, you will need a few tools:

• Natural Twine (or bungee cord)
• Pruning Shears, Hedge clippers or Loppers – don’t forget to put a nice hone on the blade with your sharpening steel.
• An Olfa snap off utility knife
• Cotton painters drop cloth.
• Gloves (optional)

I also like to have my hori hori garden knife with me no matter what garden task I’ve started out on…

Step-by-Step Guide

Let’s Get Started

Gather your tools and put on gloves (or not – if you’re feeling lucky!).

Note: be sure to wear long sleeves when working with grasses. Some of them have sharp edges that can, and will, abrade your arms if you let them.

Instructions:

Begin by combing the grass

• Rake your gloved fingers (or a hand rake gardening tool) through the middle of the clump grabbing all the dead and loose dried up grass leaves.
• Comb through the entire mass of grass and shake it periodically, this will extract more dried plant material. You may accumulate a considerable pile of dead material, which you can throw on top of the drop cloth as you move through the garden.

Tie up your grasses

For quick trims

You can also grab a bunch of grass in your hand and cut above or below. You’ll have to repeat this several times, but it works and may be easier for quick touch-ups. Instead of the drop cloth, I sometimes just bring a 5 gal bucket around if I’m just trimming up a bit.

Pruning goals

Conclusion

If you perform ornamental grass pruning as laid out above, it will keep things clean and healthy in two ways. First, it will prevent the grass from falling all over the place which will make it harder to collect and tidy up before throwing it away. Secondly, it allows you to cut the grass in a nice, clean line and leaves you with a neat looking winter garden that will be ready to grow again during the next growing season.

The post How to trim ornamental grasses – a neat and simple method that won’t leave you scrambling to clean up after you’re done. appeared first on Uncommon Gardens.

Defensible Space is the area around a building where you should focus on reducing vegetation and other debris to slow the spread of wildfire towards the building.

The defensible space is divided into three zones: Zone 0, Zone 1, and Zone 2.

Image thanks to CAL FIRE

Zone 0

 This zone is the ember-resistant zone that extends 5 feet from buildings, structures, decks, etc. This zone includes the area under and around all attached decks and requires the most stringent wildfire fuel reduction. The ember-resistant zone is designed to keep fire or embers from igniting materials that can spread the fire to your home.

The following provides guidance for this zone: use hardscape like gravel, pavers, concrete, and other noncombustible mulch materials; remove all dead and dying weeds, grass, plants, shrubs, trees, branches and vegetative debris (leaves, needles, cones, bark, etc.); check your roofs, gutters, decks, porches, stairways, etc.; remove all branches within 10 feet of any chimney or stovepipe outlet; limit combustible items (outdoor furniture, planters, etc.) on top of decks; relocate firewood and lumber to Zone 2; replace combustible fencing, gates, and arbors attach to the home with noncombustible alternatives; consider relocating garbage and recycling containers outside this zone; consider relocating boats, RVs, vehicles and other combustible items outside this zone.

Zone 1

This area extends 30 feet from buildings, structures, decks, etc. or to your property line whichever is closer. This zone is called the Lean Clean and Green Zone. In this zone remove all dead plants, grass and weeds (vegetation). Remove dead or dry leaves and pine needles from your yard. And remember to remove branches that hang over your roof and keep dead branches 10 feet away from your chimney.

Zone 2

After Zone 1 this zone extends out to 100 feet from buildings or to your property line whichever is closer.

In this zone create horizontal and vertical spacing between plants. The amount of space needed depends on how steep your property is and the size of the plants. For example large trees need more space than small trees. If you’re not sure how much space to provide consider hiring a professional landscape designer or arborist.

By implementing these zones you can reduce the risk of wildfire damage to your home.

If this all seems a little complicated, Give Us a Call and we will stop by consult on ways you can harden your home to Wildfire Risk!

The post Defensible Space is simple – and it’s essential to improve your home’s chance of surviving a wildfire! appeared first on Uncommon Gardens.

Fire Hazard Severity Zones fall into the following classifications: Moderate, High, and Very High.

These zones are classified based on the severity of the fire hazard and the likelihood of a wildfire occurring.

The classification of these zones is required by law in California, and the fire hazard severity zone designations and accompanying maps must follow the Administrative Procedures Act (APA) and be approved by the Office of Administrative Law (OAL).

The State Fire Marshal is mandated to classify lands within State Responsibility Areas into Fire Hazard Severity Zones (FHSZ).

To understand wildfire zones, it is important to understand the factors that influence fire likelihood and fire behavior.

Wildland vegetation such as grass, brush, and timber can be extremely combustible.

The vegetation can burn with great intensity and produce firebrands and burning embers that can become wind-driven hazards.

Landscape vegetation can be as combustible as wildland vegetation.

Combustible plants have these characteristics: they have a high oil or resin content; they have a high sap or resin content; they have a low moisture content; they have a high surface-to-volume ratio; they have a high fuel load; they are dead or dying.

Homeowners in higher risk wildfire zones should take steps to reduce the risk of wildfire damage to their homes by creating defensible space around their homes.

Defensible space is an area around a building where vegetation and other debris are cleared, reduced, or replaced to slow the spread of wildfire towards the building.

We will add a post soon explaining Defensible Space!

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