POTTING SOIL FIRES POSE RISK

Homeowners encouraged to monitor soil moisture

Rapid City, S.D. - As the weather warms up, the Rapid City Fire Department would like to remind homeowners to routinely check their potted plants for moisture content and to refrain from discarding smoking materials in planters.

Most of the soil found in potted plants, both in homes and outside of homes, is a soil compound that contains little mineral soil and mostly organic compounds such as peat moss. These organic compounds not only contain dead plant materials that produce heat from decomposition, but will also support smoldering combustion. Many times, plant holders filled with potting soil will receive enough water to support furthering heat of decomposition, which is exacerbated if the plant is in direct sunlight. Many times individuals will use outdoor potted plants as a receptacle for discarded smoking materials as they believe the soil is primarily dirt. Due to the ability of potting soil to support smoldering combustion, when conditions are right (hot temps, wind, dry conditions, etc.), the smoldering conditions can turn into a free burning fire. The problem quickly worsens when the pot is made of plastic or wood products and spreads to other surrounding materials.

Above: A photo shared by a Facebook follower that illustrates the potential hazards associated with potting soil. Fortunately, this planter was not on a combustible deck or near combustible material and did not result in a larger fire.

Properly dispose of any smoking materials in approved containers only and know that potting soil is not a good option. Also, consider purchasing outdoor pots made of fire resistant materials.

For questions about potting soil fires, please contact the Rapid City Fire Department at 605-394-4180.

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