Spirea
Although July is the best month for trimming of shrubs and bushes, it can be extended up to first or second week of August in some cases.
The usual answer is immediately after they have flowered. If you prune them more than once a year they are called a hedge.
the best place to by new shrubs is at the home and garden center in your local walmart i buy mine there all of the time and they are the best shrubs i have ever owned
Trees and shrubs can be lightly pruned anytime in Florida. To minimize reduction of next year's flowers, prune spring-flowering plants such as azaleas, in late spring before the flower buds set for the next season.
Cedar shrubs grow best in acidic type soils. Because of this one might find it difficult to grow other plants around cedar shrubs. It is also important to note that smaller newer cedar shrubs will take less time to establish then larger ones.
zebra
usually in trees or bushes
The best method is to dig out the roots.
pine dwarf shrubs
This is a very comprehensive answer from NC State University: http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/shrubs/text/pruning.html
There are quite a few shrubs that can be planted under cedar trees. Some of those are: flame azalea, lady fern, and aralia.
in an open area with a few trees and bushes