The aim is to improve plant performance: better fruit or vegetables, better shape, better flowers or foliage. Very often, training is just a matter of facilitating the plant’s own growth pattern.
Training should always be done in time. Do not delay until the plant has got on with the job, on its own, and then try to change it. Since a lot of tying and staking is involved in training, make sure that the ties or stakes themselves do not cause any damage.
Use soft ties that break, or expand. Never tie a plant with wire, or plastic twines that do not rot. Un-do ties before they get too tight, and check for loose ties before winter, to avoid damage. Details on training are given for plants of various where appropriate.
Source: http://www.garden.ie
