Soil Amendments: Compost High in microbial activity, retains moisture, enriches soil properties, reduces watering and helps break up clay – an excellent alternative to peat moss. Leaf and grass based. Black Peat Loam A soil amendment for preparing a well balanced growing mix. Optimizes plant growth through root development. Custom Blends Available Minimum quantities apply All products are sold in bags or bulk (cubic yard or half cubic yard) Bulk Deliveries available.