Despite recently cool temperatures, your volunteers have been responding to multiple mulch fires over the last few weeks. With spring gardening season getting into full swing, knowing how to prevent mulch fires is key to protecting your property.

Organic mulch can decompose and generate heat, potentially leading to ignition if the heat cannot dissipate. Mulch fires can also be started by discarded cigarettes, matches, or embers from grills or fire pits. Mulch that is close to the home carries the risk of igniting siding or other building materials, allowing the fire to spread up and into your home.
To reduce the risk of mulch fires at your home or business, please consider the following:

- Maintain Adequate Distance: Keep mulch away from buildings, decks, grills, and other structures. A minimum distance of 18 inches is recommended.

- Use Non-Combustible Mulch Near Structures: Consider using rocks, gravel, or sand within a 5-foot zone around structures.

- Avoid Thick Layers: Apply mulch in a thin layer (2-4 inches) to prevent heat buildup. Mulch piled too deeply (more than 6 inches) can trap heat, increasing the risk of spontaneous combustion.

- Fine or Shredded Mulch: Finely textured mulch can pack together, reducing airflow and potentially raising the heating potential.

- Keep Mulch Moist: Regularly water mulch, especially during dry periods. Dry mulch is more flammable and prone to ignition.

- Remove Debris: Regularly remove dead plants, leaves, and other debris from mulch beds.

- Be Careful with Fire: Never discard cigarettes or other burning materials in mulch.