gold shield silica supplement for plants (1 quart/32 oz) ultra concentrated | makes over 900 gallons | for all plants & gardens | strengthen plants | blue planet nutrients blue planet nutrients gold shield silica supplement contains silicon which deposits into cells walls forming stronger stems and creating a barrier of protection for plants. these deposits increase the strength of cell walls, stems, stalks, and roots, allowing plants to support heavy fruits and flowers and discourages insects, disease penetration, and alleviates environmental stress. due to the silica deposits in cell walls, the addition of gold shield will help improve overall crop quality and quantity. use as needed from seedling (at least 2 sets of true leaves) up to one week prior to harvest at a rate of 1-2 ml per gallon for small to medium plants, and 2-4 ml per gallon for medium to large plants. for a foliar spray, use up to 10ml of gold shield per gallon of water. be sure to shake your bottle well before measuring out the dosage. spray both sides of the leaves and the branches, the entire plant (but don't spray your lights!). use this foliar spray up to twice a week, but only during vegetative growth and the first 3 weeks of flowering. the ph of the foliar solution should be set to about 5.8.