Gibberellic acid (also called Gibberellin A3, GA, and GA3) is a hormone found in plants and fungi

Gibberellic acid is a simple gibberellin, a pentacyclic diterpene acid promoting growth and elongation of cells.

Gibberellins have a number of effects on plant development. It can stimulate rapid stem and root growth, induce mitotic division in the leaves of some plants, and increase seed germination rate.