After the spring is warm, you can cut off some branches that are too long, and cut off those fragile branches directly from the bottom of the rhizome. Pruning should be avoided in summer and autumn, otherwise it will not promote the growth of lilacs.

After the spring is warm, you can cut the lilacs for indoor flower arrangement. If you leave flowers on the branches, they will wither and consume too much nutrition. When lilacs are in full bloom, you can cut off those flowers and their branches. Don't feel so wasteful. In fact, it will help lilacs find more branches and open more flowers.

Every time the shears are trimmed, they should be disinfected before use, so as not to transmit fungal diseases to lilacs. You can spray them with disinfectant or wipe them with alcohol.

Precautions:

For branches that grow too long (in vain), cut them off in time. If other lateral buds grow too tender, cut them off from the bottom of the rhizome. These lateral buds will only consume nutrients and cannot bloom.

Pay attention to check lilacs regularly, cut off withered or diseased branches in time to avoid diseased branches. Pruning is also done from the bottom, and it can be cut off above the growth node, which is helpful to sprout new branches.