Grodan 1.5 Inch Starter Mini-Blocks MM40/40, 45 Count Mini-Blocks sit in a tray (flat) without support for easy starting of seeds and cuttings These Mini-Blocks are individually wrapped in white plastic to minimize algae growth Remove wrapping and transplant into any loose media such as Grow-Cubes or coconut fiber or leave wrapping on and set on top of a larger Gro-block