Most evergreen bushes can be safely pruned in early spring before new growth emerges. However, flowering evergreen plants should be pruned after they are done flowering to avoid pruning off flower buds. Bushes used as hedges or privacy screens can be pruned in late spring after new growth has emerged; this affords you easy yearly pruning of a maintained hedge.

Drummond's Pink Creeping Phlox
Drummond's Pink Creeping Phlox Evergreen Groundcover with Tons of Pink Flowers Deep Pink Flowers Attract Butterflies Great for Slopes and Walkways...
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