Willow is usually cut after leaf fall in late autumn when most energy is stored in the stem for new growth. Cutting can then continue through to early spring, but is best while the plant is still dormant and before buds start to form.

How do you keep a weeping willow healthy?

A balanced fertilizer with an equal ratio of nitrogen, phosphorus, and potassium (such as a 20-20-20 formula) is appropriate for a weeping willow. Nitrogen supports foliage growth on the tree’s long, weeping branches. Phosphorus supports the growth of roots, stems, and flowers. Potassium encourages overall health.

Can you trim a weeping willow in the summer?

Major pruning is best when trees are dormant, but because these weeping willows are fast growing, they tend to drop many twigs and branches, and often need additional maintenance during spring and summer. …