Dedication
To Gwen Steege, my outstanding editor and friend at Storey for many years, with great appreciation for her skill, understanding, and help. Sincere thanks also to editors Nancy Ringer and Teri Dunn, and to artist Elayne Sears, for transforming words into artistic and helpful images.
Contents
Chapter 1
Reasons to Prune
One fall day when I was working in the woods, I heard a noise high above me. A porcupine was sitting in the crotch of a large elm tree, skillfully cutting off large limbs and dropping them to the ground for easier nibbling. And in our back field last winter I came upon a flock of pine grosbeaks carefully nipping the buds off the Scotch pine trees.
Rabbits, mice, deer, elk, moose, and beavers also prune just not in a way that you and I would consider a horticultural achievement. Theyre simply eating out at their favorite restaurants, but in doing so they fit into the forests scheme of life quite well.
Natures Pruning
Long before man ever thought of smithing his spear into a pruning hook, Nature was at work pruning, and she still is. High winds, snow, and ice storms help to keep trees healthy by snapping off old and weak branches. Occasionally an old tree loses an entire limb or top, then grows an abundance of new branches, thus getting a new lease on life. In forests, spreading tops and crowding shade the lower limbs of tall trees, causing them to die and fall off. Blights, hurricanes, floods, and fires set by lightning frequently thin out old trees and allow new ones to take their place.
Nature has even set up a system whereby fruit trees prune themselves by thinning their crops. Weve all seen the hundreds of little apples or peaches that fall from trees in early summer if the fruit set is unusually heavy. A tree drops extras when it lacks the resources to develop them to full maturity.
From the beginning of recorded time, our early ancestors observed Natures pruning methods and tried to improve on them. They developed the art so successfully that long before the great cities of Babylon, Jerusalem, or Athens had a stone in place, pruning was an accepted practice. It is mentioned frequently in the Bible and other ancient literature. As a matter of fact, pruning was so well developed back then that it has changed amazingly little since. Although no one is likely to use a pruning hook now, we still prune for the same reasons and in much the same way.
Do I Really Have to Prune?
A little knowledge can be a dangerous thing. One day a friend invited me into his backyard to point out a badly mutilated viburnum. I read somewhere that all shrubs should be pruned occasionally, but I really didnt know how, he said apologetically. Probably his plant would survive and look fine after a few more growing seasons, but his cuts could have killed a less sturdy plant.
Dont prune just for the sake of pruning. Pick up the clippers only to correct a faulty growing condition, to prevent a future problem, or to stimulate or redirect new growth. My friends bush likely didnt need pruning at all, since viburnums grow quite well on their own. If youre growing raspberries, however, pruning is absolutely mandatory or the patch deteriorates and eventually disappears. Understand the growing habits of each of your plants, and decide exactly what you want them to do for you.
Why Should We Intervene?
In spite of the long history of pruning, however, some people still question the wisdom of it. Should we interfere with the natural scheme of things? How can we improve on Nature? A walk in the woods shows that trees grow to magnificent beauty all by themselves.
The answer to these questions, I feel, is that we dont live in the wilderness anymore. We arent able to spend all our days foraging for food. Instead were more likely to live on tiny lots where our trees and shrubs must provide beauty, protection, food, and companionship, yet still not crowd us off our claim. We can no longer abandon our berry patch or orchard when it gets overgrown and cross the ridge to look for another homesteading plot. We cant move on just because the spruces we planted as a windbreak have begun to shut out the sun and view.
In other words, Nature is too leisurely and wasteful for our modern way of life. Although its function is to provide a healthy balance of plant and animal life, the reality is that humans upset the balance long ago. These days we cant let our trees grow to full size, die, and rot peacefully for decades on the ground. We must, instead, give our plantings careful attention so that we can get the best possible use from them. We have to fertilize, prune, and protect them, and sometimes, when they have outlived their usefulness, remove them before they become a hazard. When we do these jobs we are not interfering but rather working closely with Nature.
Ive met many gardeners who dont feel completely comfortable about pruning and never take off quite enough wood, because they are nervous about hurting the plant. They know that plants look nicer and that fruit trees bear much better when they have been pruned, but they fear that each cut may be painful to the tree and that the whole idea is a bit sinful. The thought of keeping a tree sheared to a runty 4 feet when it might otherwise grow to 80 feet makes them feel guilty and uneasy. The fact is that pruning, when properly done, strengthens rather than weakens the tree.
Pruning by the Rules
As in all skills, certain rules must be followed, however, or pruning can be harmful. Some diseases can be spread by pruning tools, for instance. Pruning certain trees in late winter can result in a harmfully large sap loss. Cuts should be made so that the plant will grow attractively. Large cuts must be done skillfully, so there is no danger that the limb might accidentally split when it is only half cut off and tear back into the tree. In short, your shearing and cutting should be done for the right reason, in the right way, and at the proper time.
Pruning with a Purpose
Some plants can be pruned in a variety of ways, depending on your needs. If you are raising a crab apple primarily for jellies and juice, for instance, prune as carefully as you would any other fruit tree. On the other hand, a crab apple grown for the beauty of its flowers and fruit may need minimal pruning. Many varieties, such as the popular Dolgo, grow into beautiful specimens with almost no training. Crab apples can also be pruned into dense hedges that are almost impenetrable to animals and people by shearing them tightly several times during the summer, when they are growing, just as you would an evergreen hedge. They can even be grown as miniature trees in tubs or as espaliers against walls or fences.
The Best for Your Plants
You can prune with a clear conscience, because it is one of the best things you can do for your plants. Liberty Hyde Bailey, the famous horticulturist, said it best many years ago: Of all the operations connected with horticulture, pruning, shaping, and training bring the person into closest contact and sympathy with his plant.
To Create a Holiday Shrub
Suppose you want to grow a little blue spruce near the front steps of your one-story house and plan to put lights on it at Christmas. Shear it close every summer to keep it in a neat, tight, 6-foot size almost forever.