Japanese maples, known for their delicate beauty, can lose leaves prematurely in summer heat. The key to keeping them vibrant is adding mulch to the soil in July, according to plant care specialist Kiersten Rankel from Greg.
Rankel explains that shallow root systems make these trees vulnerable to drying out. Without sufficient moisture, leaves curl, wilt, and drop, leaving the tree bare. Mulch acts as a reservoir, retaining water that gradually filters into the ground, keeping roots cool and hydrated.
Why Mulch Works
Mulching involves adding organic material to the top layer of soil. It improves soil quality and, during warm periods, holds moisture. This stored water slowly releases, preventing the soil from drying out quickly. Rankel advises: "Summer's heat demands vigilance. Your tree's not just surviving; it's trying to thrive. Deep, less frequent watering beats shallow daily sips. Mulch is your ally, keeping roots cool and moist."
Best Mulch Types for Japanese Maples
Lightweight mulches that retain moisture are ideal. Suitable options include pine bark, wood chips, garden compost, or leaf mould. Avoid nitrogen-rich mulches like cow manure, as they encourage excessive growth, stressing the tree in hot weather when it needs to conserve energy.
How to Apply Mulch Correctly
Spread an even, thin layer around the base of the tree, keeping it clear of the trunk. Too thick a covering can prevent roots from breathing properly. After mulching, water the soil thoroughly once a week to keep the tree cool throughout summer.
Benefits Beyond Leaf Retention
Mulching also shields leaves from scorching and suppresses weeds, reducing summer gardening chores. With proper mulching and deep watering, Japanese maple leaves stay vivid red all summer, allowing gardeners to enjoy a flourishing garden without constant watering.
