(3/cs) Grodan Grow Chunks, 2cf bag, 3 BAGS PER CASE-Super light and super versatile. 2 cubic foot bag. Grow Chunks are a larger version (3/4" square) of the popular Grow Cubes. They are great for direct planting or for use as a filling around blocks in containers. They can be easily mixed with other media for increased aeration and added moisture-holding capabilities.