Grodan® A-OK Starter Plugs™ provide a reliable stonewool substrate designed for seed germination and cutting propagation in hydroponic systems. These square plugs are connected at the top, forming a sheet that fits standard 10/20 trays for easy handling. Featuring a tapered bottom for improved transplanting, they ensure optimal root development while preventing tangling. Made from spun molten rock, these plugs offer excellent water retention and aeration, promoting healthy and rapid plant growth. Ideal for cannabis cultivation, leafy greens, and culinary herbs, Grodan® A-OK Starter Plugs™ support strong, uniform seedlings for seamless integration into larger growing blocks.