These Rootrainers have a few nifty features that make them a bit different to other types of seed growing systems.
First of all they are deeper than usual seed tray systems. This makes them ideal for plants that love a deep root run such as Sweet Peas and Beans.
Secondly the open up “like a book” so that you can take the developed plug out of the cell without damaging the rootball.
However the real secret to the rootgrow system in all thanks to the small hole in the bottom of each cell. This air-prunes the taproot causing the root system to branch out and create a more even, healthy rootball.