How to Make Plants Grow Taller With Hormones

Plant hormones, called plant growth regulators or PGRs, have varied effects on plants depending on the particular chemical you use. Dipping plants in rooting hormone during propagation will stimulate the development of the roots. Treatment of potted plants with a growth regulator helps to keep the plants short, and fruit plants treated with hormones can develop larger fruit. The plant hormone responsible for making plants grow taller is gibberellins, which is produced naturally by plants and copied to manufacture synthetic products.

Application equipment
Protective clothing

Instructions

- 1
  Purchase a suitable gibberellins-based plant growth regulator for the plant on which you plan to use it. Products containing this hormone include BVB, Chrysal, Fascination and Procone. Check that the product is suitable for home gardening uses, as agriculturists commonly use PGRs in measurements of parts per million on large-scale applications.
- 2
  Use the recommended safety precautions when you apply the product. U.S. Environmental Protection Agency classifies PGRs as pesticides, which can contain ingredients that are unsafe for human contact. In some cases, you will need to wear protective clothing and a facemask to work with the products.
- 3
  Apply the product according to the chemical content and the directions provided on the packaging. For example, Chrysal contains silver nitrate and you must dilute it with specific quantities of water for various uses. Silver nitrate is not poisonous to humans but can discolor skin and is highly toxic to fish and aquatic organisms, so take care not to allow spillage into groundwater.
- 4
  Watch the plants to see the effect of the PGRs and re-apply if necessary. Some PGRs, such as the product Promalin, sell in a paint-like formula, which you can paint onto the plant at specific points. This makes re-application easier.

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