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prune roses just as or before new growth emerges from the canes (cut off the wood that died over the winter. this will promote strong, healthy shoots that will produce lots of blooms. it will also give plants a more open habit (?) which helps them resist diseases like black spot
Pines - True pines are more particular about their pruning needs than other needle-leaf evergreens. Pines form buds only at branch tips before the stem becomes woody. For best results, prune pines only in the candle stage -- before the new shoots turn woody and before the needles have fully expanded. Prune only a portion of the new growth, removing up to half of the expanding candle.
Pruning promotes healthier blooms in the spring.
What to Prune When lilac and forsythia should be pruned late spring - immediately after they finish blooming. Hydrangeas bloom on old wood. Prune these types of hydrangeas before midsummer. If you prune them in winter or early spring, you'll be removing flower buds