Made in Denmark since 1969, horticultural stonewool is widely recognized as an ideal growing substrate. Each Grodan A-OK Starter Plug has a preformed 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.
The best bang for your buck! You get a lot of cubes for your 10-20 trays or you can break them apart for your Gro Smart Tray. When saturated for a few seconds there is plenty of air to help the plant grow. Roots find their way easily through the media. I will stick with these cubes because of the ease of use and different ways I can use them.Kevin
Feb 18th 2016