Green Planet Pro Cal Horticulture Lighting Group These stakes are great for

These stakes are great for both indoor and outdoor use

easy readings

Humic and Fulvic enhanced base A & B formulas

Sturdy and ergonomically designed

Green Planet Pro Cal Horticulture Lighting Group These stakes are great forWhat it is Pro Cal is an excellent supplemental source of essential elements that plants require at all stages of growth. Our formula provides readily available calcium and magnesium, as well as iron, nitrogen, boron, and zinc to ensure your plants do not come up short when they are ready for rapid growth. How it works Plants undergo a large amount of stress and rapid assimilation of nutrients in their goal to build cell walls, produce chlorophyll,