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PruningAny Questions? |
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Archive: Plants | Hedges | Landscaping/Surfaces | Lawns and lawncare | Miscellaneous | Pests and diseases | Pruning | Trees |
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Q. I have a 10-year old Robinia (pseudoacacia) which was pruned hard by professionals earlier this year as it had grown more than we wanted and was overhanging a neighbors garden and touching their upstairs window. We enjoy its lovely yellow leaves and don't want it too small (or too large).
Now that more shoots have grown after the pruning, we would like to keep it to a manageable size and wish to know which is the correct month to lop off the tops of these shoots and shape the tree, please?
I believe that we may have to prune every year to keep it from growing to full height of about 50 feet. Am I right?
A. Your Robinia will probably react to the pruning with quite vigorous vertical growth from around the cuts. The trick is to stop this new growth from developing, so rub out the buds or cut the shoots if that bit older as soon as you can. Mid to late summer is best for pruning Robinias, but new growths can be removed as soon as you see them.
You need to stop the tree from developing any new substantial leaders which it may do, these will compete with the original leader and may result in a misshapen and structurally weak tree. Narrow crotch angles are weak in these trees.
Also, it may respond to pruning by developing suckers - shoots that grow upwards from the roots a little distance from the main trunk. Again these should be removed as soon as possible or they will compete.
Robinias don't really respond well to pruning I'm afraid, their natural vigour results in them trying to keep growing upwards and end up being an odd shape. I think if I were you, and you have the room, plant another some distance away from the house and by the time the new one has established itself, the original may have reached the point where sadly the felling axe may be needed.
Q. I have a two-year old grapevine in my greenhouse. I know that I should take off any grapes whilst still young this year, but how do I prune it? When I bought it, someone talked about cutting off leaves after a certain joint, but that person is no longer available for advice. Grateful for any information.
A. You need to tie-in the leading shoot so that your vine develops a good strong leader, allow it to grow unchecked. Any laterals that grow from this should be pinched back to five or six leaves and their side-shoots to one leaf.
In the winter cut the leader back by a half to two thirds of total length leaving only brown ripened wood. Laterals should be cut back to a single bud if it looks strong, to two buds if the lateral bud does not look so strong.
Q. What is the best time of the year to prune trees? I have Malus and Prunus - I know that one of the Prunus is called Oku-miyako but not sure of the others. Many thanks.
A. There is no one time of the year to prune trees in general, it depends on the type of tree. Some respond better to dormant season pruning, others to pruning in the active growing seasons.
Ornamental cherries are best pruned in early to mid summer, but they don't take too kindly to it. In general, don't prune unless you have to, to remove dead or dying wood or where branches are rubbing each other or on something else. Pruning is best carried out early in a Prunus' life. They are difficult to prune successfully without it being obvious where the cuts have been made so detracting from the natural shape of the tree.
Malus are best pruned from autumn to early spring before active growth begins, so if are going to prune a Malus, do so as soon as possible. They are similar to the Prunus above in that they don't really like it, though are perhaps not quite so fussy as cherries. They don't respond well to hard pruning which often leads to further die-back from the pruned point.
Pruning Tips
Pruning
is a vital part of plant and tree care. This task can be
confusing so we developed the following guide to help you prune
properly. Three basic tools suffice for most pruning jobs: shears, loppers, and a pruning saw. Keep them sharp for clean cuts; disinfect after pruning diseased material. 1. When Do Roses Need To Be Pruned? Prune in winter or
early spring when plants are still dormant. Prune plants to
maintain symmetrical bushes and to encourage strong new growth.
Cut back all previous years growth as much as one-third its
length. Remove branches that cross through center and remove
plants understock. Also prune weak and dead stems as needed.
This will also encourage strong new growth. The best time to
prune crepe myrtles is in February. Prune out twiggy stems and
any dead wood. Thin out crossing or crowding branches in the
plants center. If tree form, prune lower branches. Prune top to
maintain symmetry. Each year after flowering, cut 12 to 18
inches off the tips of branches that have bloomed. Prune in winter or early spring mostly to shape plants. Cut back wayward branches and prune out weak unproductive dead stems as needed.
Butterfly bushes
bloom in summer on new spring growth. They can be pruned in late
winter or early spring. By pruning old blooms you will encourage
new flowers. Also prune out old dead and unproductive branches. Hydrangeas fall into two groups. Some you prune in early spring and others after the flowers fade.
6. When Do Clematis Need To Be Pruned? Clematis can be put in three categories: Spring-flowering, summer-flowering , and twice-flowering.
7. When Do Fruit Trees Need To Be Pruned? The most common fruit trees are apple, peach, pear and cherry.
8. When Do Azaleas and Rhododendrons Need To Be Pruned? They can be pruned in winter or early spring. However pruning at this time will prevent plants from producing many blooms. The best time to prune azaleas and rhododendrons is just after their blooming period in spring. If you prune at this time , no additional pruning will be necessary. 9 When Do Junipers Need To Be Pruned? Junipers need very minimal pruning. They should be pruned to correct their shape, to accent their form, or to limit their size. This should be done during the juniper's growing stages in mid-summer. 10. When Do Flowering Trees Need To Be Pruned? Flowering trees should be pruned after they have finished blooming. Prune as little as possible. Dead branches, branches that cross in the center, and branches that are unproductive should be pruned out. Three basic tools suffice for most pruning jobs: shears, loppers, and a pruning saw. Keep them sharp for clean cuts; disinfect after pruning diseased material. |
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