Pegging can convert plants into vase-shaped or fountain-like shrubs; where the cane is in contact with the soil, rooting may occur, thus eventually creating a second plant to form.
Definition as written by Magpye: ...
PEGGING DOWN - A very effective way to increase flower production on Bonbon & Hybrid Perpetual roses that send up long shoots with oily flowers on the end. It is a time consuming method but well worth the display.
Catalogs often recommend "pegging" General Jacqueminot' and other long-caned roses in order to increase bloom.
Layering a stem down and pegging it to the soil produces adventitious roots.
An aerial root above ground is an example of adventitious roots. Ivy uses these roots for climbing.
Start pegging down runners on healthy plants from which you want to propagate. This is best left until after fruiting so that the prospective parent plants can be assessed.
Layering a long, flexible stem, often of a climber such as jasmine, burying or pegging it down in several places so that it produces a number of new plants. Also see layering, simple_layering, tip_layering and air_layering.
Layering is possible at any time of the year by scraping the bark near the base of a long stem, applying a rooting hormone and bending the stem down and pegging with a "V" cut from a coat hanger.
Insert this firmly into a sandy sterilising mix in a cool shaded frame and keep moist. The plant can be divided in early spring, or it can be allowed to layer by pegging down its shoots in spring and detaching them in the following season.
Another method of propagation is layering which is done by pegging a section of the stem to the ground.
Once the 'layer' is well rooted you can sever the new start from the parent plant and replant it elsewhere.
 See also: Plant, Shoot, Flower, Planting, Soil
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