Give your fruit or vegetable plants much-needed macronutrients with the FoxFarm Gringo Rasta Cal-Mag formula. This liquid plant fertilizer contains calcium and magnesium. The Gringo Rasta Cal-Mag formula is OMRI-listed for organic use. This liquid plant food strengthens cell walls in plants and aids in fruit development. This quart of liquid plant food contains macronutrients to enhance a plant's nutrient intake, which improves fruit and flower development and increases yields. The Gringo Rasta Cal-Mag Liquid Plant Food is handcrafted for organic gardening. You can use this formula for soil enrichment in flower or vegetable gardens. You can even use this liquid plant food for hydroponic systems. The formula helps prevent blossom end rot and tip burn. This organic cal-mag formula from FoxFarm is a great tool for new gardeners and regular green thumbs alike.