You can split a snowball bush if it is a large, healthy one. It's best to split it in winter, when the plant is dormant.
Viburnum opulus "sterile" the Snowball bush is a shrub or small tree and has a reasonable life span but it is easily propogated.
most spring blooming shrubs require pruning after the blooms are gone, but before fall.
It is possible to move a snowball bush if it is getting to large for its place. This involves pulling the bush up from its roots and moving it to well-drained soil.
Mid Spring in TN.
The snowball bush flowers on the old wood. So after the blooming the flowers turn light brown this is normal. If the plant must be pruned you must wait until after its bloom.
The only way I have found to chane the color on the blooms is to acidify the soil for blue or ironize the soil for pink hope this helps
It is best to plant snowball bushes in the spring because they bloom from April to May. Make sure they are planted in full sun or partial shade.
It will grow naturally. You only need to prune a shrub to contain it .
You probably have too much acid in your soil.
Apply plenty of water during the first summer. Do not let the rootball dry out.
snowball snowball