Japanese maples can display stunning red and orange foliage in autumn if they receive proper watering in August, according to horticultural specialists at Plant Addicts. The key is to water them in the morning, before 10am, to avoid leaf scorch and keep the tree healthy.
Why Morning Watering Matters
The experts explained: "The best time of the day to water Japanese maples is during the morning, which allows plenty of time for the roots to soak up the water." Watering in the afternoon, when sunshine is at its peak, leads to higher evaporation rates, meaning less moisture reaches the soil. This can leave the tree parched and vulnerable to premature leaf drop.
Water droplets can also warm up and act like miniature lenses, scorching the foliage and placing strain on the tree. Evening watering is possible, but without evaporation, leaves stay damp overnight, which can encourage fungal diseases and attract pests like slugs.
How to Water for Best Results
The ideal time is before 9am to 10am, when cooler soil temperatures allow proper absorption. This timing also gives leaves time to dry before the afternoon heat, helping them stay healthy as autumn approaches.
During summer, Japanese maples need watering at least twice a week, but potted specimens require attention four times a week because they dry out more quickly. Spending just 10 minutes each morning watering can maximise the tree's resilience and ensure it looks magnificent when autumn arrives in late September.
