Pro Gib 4% is a naturally occurring hormone that promotes vigorous growth, increased produce size and speedy maturation. It's powerful; use according to directions. Amounts to use vary depending on crop. Mix rates range from 0.30 to 3 oz per 100 gallons of water. General application ranges from 100 to 150 gallons per acre. Use as a foliar spray. Most commonly used on grapes, berries, spinach, hops, citrus, celery, etc. Contains 4.0% Gibberellic Acid in a liquid solution. For CA commercial growers, a Pest. I.D.# is required. Call for availability.