The Role of Mulching in Hot Weather Tree Care

Mulching can make a significant difference in helping trees retain moisture and withstand the summer heat. When done correctly, mulch can:

• Regulate Soil Temperature: A good layer of mulch acts as an insulator, keeping roots cooler during hot days.
• Reduce Water Evaporation: Mulch helps reduce the amount of water that evaporates from the soil, allowing trees to retain moisture for longer.
• Improve Soil Quality: Organic mulch breaks down over time, enriching the soil with nutrients and enhancing soil structure, which improves water absorption and root growth.
• Control Weeds: Mulch helps block sunlight from reaching weed seeds, reducing weed growth that would otherwise compete with trees for water.

1. Choosing the Right Mulch for Hot Weather

The type of mulch you choose can impact how well your trees fare during Missouri’s summer heat. For optimal tree health, consider these mulches:

• Wood Chips and Shredded Bark: These are excellent options for tree mulching as they decompose slowly, adding nutrients to the soil and keeping the temperature stable. Wood chips and shredded bark also retain moisture effectively, which is ideal for the summer months.
• Pine Needles: Pine needles break down slowly, are resistant to compaction, and allow for better airflow. They are particularly beneficial for trees that prefer slightly acidic soil.
• Avoid Rubber or Rock Mulch: While rubber and rocks provide insulation, they can trap heat, making the soil even warmer. For trees, organic mulch is generally a better choice for its moisture-retaining and soil-improving qualities.