Materials & Buying Guides
Soil & Amendments
Compost, manure, lime, worm castings and other amendments: what each one does and when soil needs it.
Soil & Amendments covers the materials you add to garden soil to change its structure, fertility, or chemistry, and explains what each one does and when a bed actually needs it. The articles here look at organic matter sources such as composted manure, leaf mold, and worm castings, along with green manure cover crops that feed soil between seasons. They also cover mineral and liquid inputs, including lime, sulfur, rock phosphate, fish emulsion, kelp, and Epsom salt, and where each one fits.
Soil pH gets its own attention, since pH controls the chemical availability of plant nutrients. Structural amendments like perlite, vermiculite, and biochar are compared for their effect on drainage, aeration, and water retention.
- Green Manure Cover Crops: What to Plant and When
- Perlite vs Vermiculite: Which Aerates Soil Better
- Worm Castings: The Premium Soil Amendment Worth the Cost
- Biochar in the Garden: Benefits, Risks, and How to Use It
- Epsom Salt in the Garden: Separating Myths from Science
- Leaf Mold: The Free Soil Amendment Hiding in Your Yard
- Rock Phosphate and Soft Rock Phosphate: Slow-Release Minerals for Long-Term Fertility
- Fish Emulsion and Kelp: Liquid Organic Fertilizers That Actually Work
- Composted Manure Guide: Horse, Cow, Chicken, and What to Avoid
- Sulfur for Acidic Soil: Growing Blueberries, Azaleas, and Acid-Loving Plants
- Garden Lime: When Your Soil Needs It and How Much to Apply
- Soil pH for Vegetables: Testing, Adjusting, and Maintaining the Sweet Spot
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