Silica supplements earn their place in a sativa grow more than in most. The long thin branches on these lines struggle to hold heavy late flower colas, and potassium silicate added from early veg produces visibly thicker stems and stiffer petioles. The supplement notes on
https://hazesativaseeds.com point out that silica must be added to the reservoir before other nutrients and kept away from acidic concentrates or it drops out of solution. It is cheap, and the difference in how a tall plant holds itself in week fourteen is real.