Grow Media Grow Blocks
Grow blocks, grow squares, and grow cylinders are available in different sizes to suit all types of plants. Choose from Grodan Rockwool, Coco, and Sure To Grow substrates. Growing blocks and cylinders are used for direct sowing or (blocking on) of Multiblock plants. Blocks can be placed in grow pots, hydroponic systems, or on top of a slab or grow mat to provide for a larger growing volume. Recommended for long-term crops such as tomatoes and cucumbers or plants which require a larger volume of media for growth.