Gravity Flower Hardener contains active amino acids that can increase the size and mass of your flowers, fruits and vegetables! Our customers say they see the difference in just 1 or 2 days. 

Humboldt County's Own proprietary kelp extract includes phosphorus, 0.75% kelp extract and 0.01% vitamin B1. Gravity's concentrated formula requires only one or two treatments late in the bloom cycle, so a little goes a long way.

Use this additive with your current plant nutrient regime, but nutrient concentration should be reduced by about 1/3 when applying Gravity Flower Hardener. If plants are grown under HPS lighting, lights should be raised an additional 6-12 inches.

Application rate:

Soil - use 1 - 2 tsp. per gallon of water

Hydroponics - use 1 tsp. per gallon of nutrient solution.

NPK:  0-2-0