Organic Soil Amendments

Find the highest quality organic soil amendments at Horizen Hydroponics. We stock a wide variety of organic components such as worm castings, bone meal, kelp, alfalfa, greensand, bat guano and more at prices you'll love. Whether you're mixing an organic super-soil or trying to rejuvenate an outdoor vegetable garden, you'll find the perfect blend of organic fertilizers for your garden. Free shipping available for orders over $250.

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Items 1-12 of 43