Element 6 100% Organic and Biodegradable Rose Block 1003 2.2 lbs; 5.5"w x 3.5"d x 8"h Covers 0.5 cubic feet; 3 square feet at 2" depth; 2 square feet at 3" depth Balanced pH and Organic Nature Mixes Well with Other Raw Materials in the Growing Medium Will Not Grow Mildew in Storage High Air Porosity for Excellent Aeration