xtsho Well-Known Member Oct 5, 2020 #3 0.7 grams of potassium silicate per gallon of water yields 49 ppm of potassium, 98 ppm of SiO2, and 46 ppm Si. I've been spraying 1.5 grams per gallon on an outside plant to prevent PM. So far no PM and no adverse effects to the leaves of the plant.
0.7 grams of potassium silicate per gallon of water yields 49 ppm of potassium, 98 ppm of SiO2, and 46 ppm Si. I've been spraying 1.5 grams per gallon on an outside plant to prevent PM. So far no PM and no adverse effects to the leaves of the plant.
