Friday, November 7, 2008

Best time for pruning shrubs and trees

It depends what you are pruning. Prune flowering trees and shrubs just after their period of heavy bloom. Wait until winter to prune deciduous trees (maple, oak, etc.).

· Early-flowering shrubs (Rhododendrons, Azaleas) should be pruned immediately after they have finished blooming because that's when they set the buds that will bloom next spring. Unless, of course, if it has grown out of control. You may be sacrificing some of next spring buds, but whatever you haven't cut off will still flower.

· Late-summer blooming shrubs bloom on new growth from that spring (Rose of Sharon, butterfly bush aka buddleia) so prune them anytime after they flower in late summer right up until the following spring without sacrificing any flowers.

· Deciduous trees - Autumn is NOT the ideal season to prune. When deciduous trees are dormant during the winter, it's easier to prune them without the leaves. You can see the structure of the tree more clearly, it's easier to see damage and where corrective pruning is needed. Plus without leaves, it's easier to access the parts you need access to.

· Evergreens and Shrubs should be pruned after flowering. Holly, Winterberry, etc. can be pruned late fall for Christmas decorating. Coniferous plants that put out their entire year's new growth all at once in late spring (pines, spruces, and firs) can be pruned while the new growth is still fresh and pale green. Do not prune them back to old wood because they will not produce new shoots from those sections. Prune Conifers that grow throughout the summer (yews, arborvitae, and junipers) once in early summer and again, if necessary, later in the season. They can also be pruned more heavily, down to old wood if necessary.

· Formal hedges can be pruned at any season, as needed, except at the end of summer (when pruning may encourage new growth that will be susceptible to winter damage).

  • Any time of year you can lop off any damaged, diseased or dead branches before problems spread.

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