Training Trees for Fantastical Forms
There’s something magical about a tree that’s been carefully trained into the form of a graceful beast or an intriguing abstract shape. A trained tree or two in the yard attracts attention like no other feature. Creating formed trees involves pruning, shearing, grafting, wiring, training, staking, or combination of these. Some forms, such as those involving grafting, need to be started while plants are young, while others—pompons, for example—may be undertaken once the plants have reached maturity. Trained forms require constant maintenance to maintain their shape. Imagination and perseverance are the only limits to the kinds of forms that can be created, though most fall into one of the following groups:
Also called “sculptured” by some artists, topiary forms include anything you can imagine. One interesting topiary scene features a dancer and an admirer who watches her while quaffing a glass of beer. Naturally, there are simpler topiaries, too—baskets, spheres, cubes, pyramids…topiaries can be as simple or complex as the creator desires. They can often be spotted on large estates and in city parks. Yews, spruce, and broadleaf evergreens like laurels and boxwoods are particularly suited to this art form.
Many people associate bonsai with small shrubs, but larger plants can also be trained in the traditional Japanese manner. However, cabling or staking may be required to train parts of the tree to various heights. Any tools and equipment used to create traditional bonsai may be used to create the larger forms—the scale and plant variety is all that changes.
Espaliers are typically two-dimensional forms, with branches trained to grow horizontally, nearly flat along a fence or wall. Pyramids and diamonds are common “pictures” drawn with espaliers, though the possibilities extend far beyond such simple shapes. The cordon, a variation of the espalier, is a form often used for fruit trees. In cordons, the branches are often trained to follow a vertical or oblique pattern.
Oriental Pompons usually appear as upright, multi-branched forms, each branch topped with a sphere of foliage. A variation is “Hindu Pan,” which usually (but not exclusively) uses pines and is larger than the typical oriental pompon, which uses most evergreens and broadleaf evergreens.
Spirals are relatively simple forms—a tree is trained to grow in the form of a corkscrew. Spiral forms are excellent for framing an entrance to a garden or driveway. Junipers and cedars are the most common trees used for spirals.
Trees trained into a serpentine form have an upright, snake-like main stem; smaller branches hang or weep down from this main stem. Birch and larch trees are the most commonly used trees for serpentines.
In dautsugi, two or more different cultivars of a plant are grafted onto a single rootstock. For example, a globe spruce may be mated to a weeping Norway for a striking combination of upright and weeping branches.
Standards describe any trees that have been grafted onto a compatible understock. The height of the graft varies according to the desired effect. Top growth is usually spherical, and there are no branches along the trunk. The resulting form resembles a popsicle.