How to Use Gibberellic Acid on Grapevines

Gibberellic acid is a liquid solution that is manufactured from a fungus called Gibberella fujikuroi, according to the J.L. Hudson Seed website. The acid produces benefits to numerous types of plants and will speed the germination process of some species. When growers apply gibberellic acid to grapevines, the vines produce larger grapes and more fruit than untreated vines. Accurate measuring of gibberellic acid is critical when applying it, as too much will prevent additional fruiting.

Garden sprayer
Water
Gibberellic acid

Instructions

- 1
  Watch the grape vines carefully for the first signs of flowers. Once the vine produces flowers, wait an additional seven to 10 days until the first signs of fruit form. The length of each vine shoot should be between 2 and 5 inches.
- 2
  Pour the gibberellic acid into a garden sprayer and dilute it with water in accordance with the manufacturer's instructions. Make sure that you follow the proper amounts for your size grapevine, as too much gibberellic acid can retard fruit production.
- 3
  Spray the grape vines with the garden sprayer focusing mainly on the tiny grape buds along the vine. Make sure that the grape buds are thoroughly covered.
- 4
  Wait one week, then apply gibberellic acid in the same manner and concentration as the first time.

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