Emerald Harvest® Sturdy Stalk, Potassium Silicate Supplement (6 Gallon) Water Filtration Systems KoolBloom® is a highly concentrated Bamboo Stakes KoolBloom® is a highly concentrated nutrient supplement that promotes abundant flowering and facilitates ripening in annual flowers and herbs The white surface of our Panda Film reflects 90% of light omitted and the black surface prevents any light from penetrating through Sturdy stalk's key ingredient silica fortifies your plants and enriches the internal structures needed to support top heavy plants laden with flowers and fruits Build up your plant cell walls and encourage productivity with sturdy stalk