Hillside homes in Malibu, Bel Air, Calabasas and the Hollywood Hills are often defined by their gardens. The challenge is that dense, dry vegetation close to a house is exactly what carries fire to it. The good news is that thoughtful landscaping can look beautiful and resist fire at the same time.
Start with the five-foot zone
The area within five feet of the house should contain nothing that burns easily. That is the single most important landscaping decision you can make. Use gravel, decomposed granite, stone or pavers, and keep any plants in this zone sparse, low and well watered. Our Zone 0 guide covers the details.
Choose plants by how they burn
No plant is fireproof, but some resist ignition far better than others.
Better choices tend to have:
- High moisture content in leaves
- Low levels of oils, resins and waxes
- Open branching with little dead material inside
- Low growth habits near the house
Plants to keep away from the house:
- Species high in oils or resins, such as many junipers and some ornamental grasses
- Plants that accumulate dead material inside, like overgrown rosemary or bamboo
- Tall hedges that touch eaves or windows
Your local fire agency and the University of California Cooperative Extension publish regional plant guidance worth checking before you plant.
Spacing matters as much as species
Even fire-resistant plants will burn if they are packed together. Create space:
- Horizontally between shrubs and groups of plants, especially on slopes
- Vertically between the ground and tree canopies by removing low branches
- Between plants and the house, with larger, woodier plants farther away
On steep lots, fire moves uphill quickly. Increase spacing on the downhill side of the home, where fire is most likely to approach.
Use hardscape as a firebreak
Patios, stone walls, gravel paths, pool decks and driveways break up fuel and give firefighters room to work. Designing these elements between the house and natural vegetation creates a buffer that looks intentional.
Mulch and ground cover
Bark mulch and shredded wood can smolder and carry embers to the house. Near the home, switch to rock mulch or gravel. Farther out, keep organic mulch in thin layers and away from structures.
Irrigation and maintenance
Well-watered plants are harder to ignite. Keep irrigation working, especially before fall wind events in Southern California. Remove dead leaves, prune dead branches and clear debris from under shrubs and decks regularly.
Add a protective layer before fire weather
Even a well-designed garden can catch embers during a wind-driven fire. Wetline's pre-treatment service applies a plant-based, pH neutral fire suppressant to plants, decks and fences before high-risk periods. It keeps working after it dries, so embers that land don't take hold.
For homes in the most exposed locations, an exterior sprinkler system keeps the landscape and roof wet during an event, even when you're evacuated.
Landscaping and insurance
California's Safer from Wildfires framework recognizes the five-foot ember-resistant zone and defensible space compliance. A landscape plan that meets those standards, documented alongside structure hardening, strengthens your case with insurers.
Putting it together
- Make the first five feet noncombustible.
- Choose high-moisture, low-oil plants and keep woody plants farther out.
- Space plants horizontally and vertically, especially downhill.
- Use hardscape to break up fuel.
- Switch to rock mulch near the house.
- Keep everything irrigated and maintained.
- Pre-treat before fire weather.
Want a professional review? A free Wetline assessment covers your landscaping, defensible space and the house itself.
