Gardeners with Japanese maple trees are being urged to carry out three essential tasks before summer arrives, according to experts at Herter Nursery. The slow-growing, compact tree is prized for its deep red leaves and suitability for smaller spaces, but rising temperatures require specific care to keep it healthy.
Spring is the best time for light pruning, the experts advise. Focus on removing dead or weak branches to improve airflow, and cut back any crossing or crowded branches that could cause damage as they grow. Heavy pruning in early spring should be avoided, as it can stress the tree; instead, wait until late spring for shaping.
Applying a fresh layer of mulch is also recommended. A two to three inch layer of shredded bark, wood chips, or pine needles around the base helps retain moisture, regulate temperature, and suppress weeds. However, mulch should not be piled against the trunk, as this can lead to rot. Organic mulch breaks down over time, so it may need replenishing to maintain the recommended depth.
Watering is the third key task. Japanese maples prefer moist but not soggy soil. The experts warn that overwatering can harm roots, while too little water causes stress. Check soil moisture by inserting a finger one to two inches into the soil, and water deeply once or twice a week depending on rainfall. Morning watering is best to allow roots to absorb moisture before the heat of the day.
