Soil & Plant Nutrition

Everything you need to build healthy soil and feed thriving plants — all in one place. This collection brings together composters, soil mixers, fertilizer injectors, premium soils, organic amendments, and a wide range of plant nutrients and additives. Whether you're starting a garden bed, boosting root health, or fine-tuning a fertigation system, you’ll find the tools and products to support strong, productive growth from the ground up.

Like the humans they help feed, plants need good nutrition to reach their full potential. Give plants a quick boost or fortify soil for long-term sustainability with our selection of plant nutrients. We have everything you need to amend the in-ground soil or create a bountiful indoor growing environment.

There are many types of plants, and each has unique nutrient requirements. If your existing soil isn’t adequate for the plants you want to grow, don’t let that discourage you. Instead, use soil and plant nutrients from top brands to support your needs.

The time-tested way to improve soil quality is fertilizer — but not just any will do. We have dozens of plant fertilizer formulas in amounts ranging from small bags to giant pallets. Choose a balanced fertilizer for all-purpose gardening or get formulas high in certain nutrients like phosphorus and magnesium. Some fertilizers are aimed at specific plant types like nightshades and citrus fruits. There are plenty of organic fertilizers, too.

Do you want to make your own fertilizer or potting mix? Use indoor composters, backyard compost tumblers and soil batch mixers. You’ll need a good way to apply liquid and water-soluble fertilizers, so check out fertilizer injectors and replacement parts. We also have rooting hormone to improve success rates when propagating from cuttings.

Not only does Greenhouse Megastore have the best selection of soil nutrition supplies, but we offer a Price Match Guarantee. You’ll enjoy unbeatable value on everything from worm castings to portable fertigation. Call us toll-free at 1-888-281-9337 for assistance from a friendly sales associate.