Gibberellins A4 A7 (Gibberellin A4 and A7) is the Gibberellin A4 Mixture With Gibberellin A7. Gibberellins A4 A7 promotes internode elongation & breaks certain dormancies in seeds. Gibberellins A4 A7 is an endogenous plant growth regulator, promotes the growth and elongation of cells.