How Is Gibberellic Acid Used for Plant Growth?


Gibberellic acid is a hormone found in some plants. It is essential for germination of seeds and growth of plants as well as for flower and fruiting.


Gibberellic acid refers to a group of compounds called gibberellins found in some plants. It affects the growth of plants by regulating cell division and stem elongation.


The most common form of gibberellic acid is found in a fungus, Gibberella fujikuroi. The fungus is grown in large vats. Then the gibberellic acid is extracted and purified for use in powdered or liquid formulas.

Seed Germination

Gibberellic acid stimulates germination of seeds that usually need some type of pre-treatment, such as chilling, scarifying or aging. Tubers treated with gibberellic acid sprout earlier than those that have not been treated.

Plant Growth

Gibberellic acid increases plant growth and induces flowering and fruiting. It also increases the size and yield of fruit.


The amount of gibberellic acid needed to change the growth, flowering or fruiting of a plant varies according to the species of plant. Applying more than the required amount may cause the opposite effect of what's desired. Applying less than the necessary amount may entail repeated treatments to achieve the desired effect.


  • J. L. Hudson
  • Biology Online
  • Plant Hormones

Who Can Help

  • California Rare Fruit Growers

About this Author

Melody Lee began working as a reporter and copywriter for the "Jasper News" in 2004 and was promoted to editor in 2005. She also edits magazine articles and books. Lee holds a degree in landscape design, is a Florida Master Gardener, and has more than 25 years of gardening experience.