Japanese maples are among the most stunning and easy-to-grow trees for UK gardens, known for their spectacular seasonal colour changes, uniquely shaped foliage, and adaptability to containers or small spaces. While they require minimal maintenance, summer poses challenges that demand extra care.
Watering Is Vital for Summer Health
Gardening specialist Roger Eavis, owner of Greenshutters Garden Centre, emphasises that keeping soil moist is crucial. He states: 'Keep the soil or compost well-watered and never let them dry out. If the leaves appear dry or scorched, this is likely a lack of moisture—the main cause of dieback.'
Eavis advises watering once daily during hot weather for potted trees, and two to three times weekly for those planted in the ground. He adds: 'Most Japanese maples will grow happily in direct sun if kept well-watered. If not, plant them where they get shade for part of the day.'
Adjust to Weather Conditions
Monitor weather and adjust watering accordingly. During extreme heat or dry spells, increase frequency; during heavy rainfall, reduce to prevent waterlogging. Japanese maples thrive in consistently moist conditions but suffer if overwatered.
Check Soil Moisture Regularly
Test soil moisture by inserting a finger or moisture meter one to two inches deep. If it feels dry at that depth, it is time to water. This prevents both under- and overwatering.
Deep Watering Encourages Strong Roots
Water deeply for several minutes with a hose or longer with a sprinkler for ground-planted trees. This encourages roots to grow deeper, making the tree more resilient during dry spells. For container trees, water until it drains from the bottom to ensure the entire root system is hydrated.
Best Time and Method for Watering
Water first thing in the morning to allow absorption before the heat of the day, reducing evaporation. Always direct water at the roots, as Japanese maples absorb water only through roots—watering leaves is pointless.
