Grow, Astoria-Pacific, Clackamus, Ore.). Sixteen trays, each containing 18 cuttings, were arranged into four blocks with four trays per block. Treatments within blocks consisted of trays arranged randomly and misted with tap water (control) or 50, 100, or 150 mg·L–1 Si as sodium silicate. Sodium silicate was injected into the misting system by using a different Dosmatic Advantage fertilizer injection system (Dosmatic USA, Carrollton, Texas) for each treatment. Trays were separated by plastic sheets to prevent drift.