椰糠是一种天然的生长介质，由椰子壳的纤维状外壳制成。它被用作土壤替代品和水培基质，因其优异的保水性、通气性和对病虫害的天然抵抗力而备受推崇。它是椰子产业的一种可再生副产品。
关键事实
- Holds 8–10 times its weight in water while maintaining good air porosity
- Slightly acidic pH (5.5–6.5) — compatible with hydroponic nutrient solutions
- Contains natural trichoderma fungi that suppress root pathogens
- Available as loose coir, compressed bricks, and blended with perlite
- Requires buffering with a calcium-magnesium solution before first use (coir binds Ca and Mg)
- Sustainable and renewable — a byproduct of coconut processing