The new format of the Root Riot 77 planting sponge from Growth Technology. The planting sponge has space for up to 77 seedlings or cuttings. Root Riot is made from composted organic materials. The planting cubes have a perfect, spongy texture that maintains the perfect air-water ratio for healthy, rapid root growth. The cubes are specially enriched with micronutrients to nourish young plants and also contain special fungi that support and develop the roots. Ideal in combination with other Growth Technology products.