Each Grodan A-OK Starter Plug has a pre-formed hole to insure easy seed or cutting placement. Gardeners simply wait for plant roots to penetrate the bottom of each A-OK Starter Plug before transplanting them into a larger stonewool cube or block. Grodan stonewool is known for its quality, consistency and performance. This is a single sheet of 50, two-inch plugs.
An inorganic and sterile growing medium made from spun molten rock
A superior medium for rooting cuttings
Provides 20% air space when saturated
Does not contain nutrients
Condition by soaking for eight hours