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Earthworm Casting 12 lbs. Bag

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About This Product Our pure, screened, OMRI Listed earthworm castings are an excellent all natural organic soil amendment great for all indoo...

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Soil Treatment 25 lbs. Organic

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About This Product Revive 25 lbs. organic soil treatment granules are for adding to lawns and gardens. Composed of organic matter and fortifi...

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Spangnum Peat Moss 2 lbs.

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About This Product Grow stronger plants with Miracle-Gro Sphagnum Peat Moss. Enriched with Miracle-Gro Plant Food, the mix helps promote stro...

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Growing Mix 2 cu.ft. all purpose

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About This Product Complete and ready to use this peat-based All Purpose Growing Mix is suitable for indoor and outdoor planting. It is offer...

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Earthworm Casting 6 lbs. Bag

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About This Product Earthworm Castings Plant Food is an all organic soil amendment ideal for growers. Derived from earthworms, earthworm casti...

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Pulverized Gypsum 40 lb. White Blend

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About This Product Classic Stone 40 lb. Gypsum Lawn and Garden Soil Softener helps improve soil conditions. Gypsum allows for a deep, healthy...

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Epsom Salt 7 lb. for Plants, Lawns, Gardens

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About This Product Pennington Fast Acting Lime Plus AST goes to work right away to raise your soil pH. Low pH can cause moss and bare spots in your...

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Growing Mix 2.2 cu.ft. with Mycorrhizae

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About This Product SunShine Mix #4 with Mycorrhizae is an ideal choice for both indoor and outdoor gardening. This high drainage mix is known...

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Perlite Soil 8 qt.

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About This Product Help prevent soil compaction and promote strong root development with Miracle-Gro Perlite. Enriched with Miracle-Gro Plant...

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Perlite Soil 2 cu.ft. Organic

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About This Product Perlite is a lightweight, organic soil amendment that can be used to improve drainage and aeration in potting mixes. Perli...

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Soil Amendments: What You Need to Know

Soil amendments, also known as enhancers, conditioners, or soil boosters, are used to improve soil structure, nutrient content, and water retention for healthier plant growth. This category includes organic and mineral-based materials such as earthworm castings, gypsum, moss, and perlite. Pack sizes range from 2 lbs. to 40 lbs., and include both loose and compressed options designed for use in lawns, gardens, and potting environments.

Type:

  • Earthworm Casting: Organic material created from decomposed plant matter processed by earthworms. Packed with natural nutrients and microbial life, castings enhance soil fertility and structure without synthetic additives.
  • Epsom Salt: A natural source of magnesium and sulfur, Epsom salt is used to correct soil deficiencies, improve plant color, and increase flower and fruit production. Often applied to roses, tomatoes, and lawns.
  • Growing Mix: All-purpose growing blends designed for direct planting or seed starting. These mixes often include components like mycorrhizae and peat for improved root development and water management.
  • Gypsum: A soil softener used to break up heavy clay soils and improve drainage. Gypsum also adds calcium and sulfur without altering soil pH, making it suitable for both lawns and garden beds.
  • Moss: Sphagnum and sheet mosses are ideal for water retention and top dressing. Often used in terrariums, decorative containers, or as protective mulch in plant pots.
  • Perlite Soil: Lightweight and porous, perlite improves aeration and drainage when mixed into soil. Commonly used in seed starting, container gardening, and hydroponic setups.
  • Soil Treatment: Pre-mixed amendments formulated to restore depleted soils or support new planting. These blends may include composted organics, minerals, and soil conditioners in one ready-to-use format.

At Supply Ontime, we offer reliable materials designed to meet your project’s needs. With same-day delivery across the Greater Los Angeles area, we make it easy to keep your projects on schedule. Order Soil Amendments now and get them delivered today!