Black & White Poly size:25' roll ONA Blocks are available in

ONA Blocks are available in Pro

provides a more balanced approach to Nitrogen for optimal plant growth

Pro Cal is an excellent supplemental source of essential elements that plants require at all stages of growth

meant for the growing stage of plants

Efficient soil warming solution

Black & White Poly size:25' roll ONA Blocks are available inBlack & White Poly Black & White Poly is the strongest commercial grade 6mm (+ ) on the market. The white side reflects 90% of light back to your plants. The black side blocks all light penetration. This heavy duty waterproof poly comes individually bagged and boxed for customers' convenience. White Black plastic (also known as panda plastic or "poly") "Poly" is useful if you are setting up a temporary grow room or don't want to damage the walls. Poly