Wonder Soil Organic Coco Coir Cube - Includes Worm Castings and Amendments, Promotes Fast Germination and Strong Root System (Expands to 2 1/2 cu. ft) Expands to 2.5 cubic feet of premium planting mix in mere minutes Includes: Coconut Coir, Mycorrhizae, Worm Castings, & More Promotes Faster & Fuller Germination, Stornger & Larger Roots Can be used to grow by itself or mixed with existing soil Ships Dry, not paying for water