What physical condition is primarily improved by applying mulch to plants?

Applying mulch primarily helps with soil temperature moderation. Mulch acts as a barrier between the soil and the air, which can help maintain cooler soil temperatures in hot weather and warmer soil temperatures during cold periods. This moderation of soil temperature creates a more stable environment for plant roots, enhancing growth and overall plant health.

While mulch can also positively affect other areas related to plant health, such as moisture retention and weed suppression, its primary benefit in this context relates to how it helps regulate soil temperatures. This temperature stabilization supports the optimal growth conditions that plants need throughout different seasons.