When Is the Best Time to Trim a Japanese Maple Tree?

Japanese maples grow best when pruned regularly.

The Japanese maple, or Acer palmatum, reaches a maximum height and width of 20 feet, though many cultivars remain smaller, according to the University of Florida IFAS Extension. Pruning removes low or drooping branches and, when done at the correct time, encourages strong development and rapid growth.

Season

Prune Japanese maple in late winter or early spring, while the tree is still dormant. Pruning too late in the spring removes leaf buds, eliminating new growth, cautions Washington State University Extension.

Frequency

Prune the Japanese maple lightly every year. This keeps the tree healthy and encourages a pleasing shape. Remove crossing branches, as well as excessive growth inside the main structure of the tree.

Considerations

Summer pruning may work better when trying to thin branches to develop the layers within the structure of this tree. Avoid excessive pruning during this time, as previously shaded bark may scald when exposed to more sunlight, advises University of California Master Gardener Michelle Le Strange.

References

• University of Florida Extension: Acer palmatum: Japanese Maple
• Washington State University Extension: Pruning Deciduous Shrubs
• University of California: Pruning Japanese Maples

Resources

• A&M University Extension: Proper Pruning Techniques