Crab/Lobster shell chunks

Crab/Lobster Shell Chunks are an organic crab shell soil amendment (5-3-0) that feeds plants while improving soil structure. Derived from natural crab shells, this dry, chitin-rich amendment supplies calcium and magnesium, builds organic matter, and supports a more resilient growing environment.

At a glance

• Type: Organic crab/lobster shell soil amendment
• Analysis: N-P-K 5-3-0
• Calcium and magnesium: Calcium 17%, Magnesium 1%
• Chitin-rich: Promotes chitin-eating bacteria and microbial activity
• Pest support: Helps deter ants, grubs, fungus, and root nematodes
• Certification: Organic

Best for

• Vegetable and flower beds and perennials
• Lawns applied with a broadcast spreader
• Containers and raised beds
• Building deeper root systems and soil structure
• Natural pest and weed suppression

How to use

Work the chunks into the soil prior to planting to improve root anchorage and nutrient access, or top-dress beds and lawns to gradually enrich the soil over time. For lawns, apply with a broadcast spreader and water in to help incorporation. Regular seasonal applications support long-term soil health and plant vigor.

About The Soil Makers

The Soil Makers take a science-forward, soil-first approach to amendments designed to support robust plant growth and sustainable soil health without synthetic inputs.