08/07/2026
With all the wildfire smoke lately, we thought it would be a fitting time to highlight some of the fire adaptations of plants native to our region!
First up is Smooth Sumac (Rhus glabra), one of our most fire-resistant plants. It maintains high moisture levels in its foliage, has broad leaves that are less prone to ignition, lacks the highly volatile oils found in many fire-prone species, and naturally sheds its lower branches as it matures, creating separation from surface fuels. If it does burn, it often resprouts vigorously from underground rhizomes that are protected from the heat of the fire.
Swipe to learn about a few more native species and their responses to wildfire 👉🏻
Mock Orange (Philadelphus lewisii) is also quite fire-resistant thanks to its high moisture content and low levels of flammable resins. Its leaves and flowers contain saponins, soap-like compounds that are highly fire retardant. Following fire, Mock Orange can often regenerate by resprouting from its root crown, allowing it to recover even when above-ground growth is damaged.
Snowbrush Ceanothus (Ceanothus velutinus) takes a different approach than the previous species. Instead of resisting fire, it depends on it. Its seeds can remain dormant in the soil for decades, and heat from wildfire helps break their dormancy and trigger germination. Snowbrush Ceonothus is also a nitrogen fixer, which allows it to replenish nitrogen depleted soil following wildfires.
Ponderosa Pine (Pinus ponderosa) is one of our most fire-adapted conifers. Historically, it evolved alongside our region’s frequent medium- and low-intensity fires. Mature trees develop thick, insulating bark that protects living tissue from heat, and they naturally shed many of their lower branches, which reduces the likelihood that fires will climb into the canopy.
Fireweed (Chamaenerion angustifolium) is a disturbance colonizer that produces extremely wind-mobile seeds capable of travelling several kilometres in search of new burn areas to thrive in. It is often one of the first colourful signs that a burned area is recovering. Its underground rhizomes can also often survive wildfires, allowing it to quickly re-establish af