Similar to those used in commercial nurseries, this seed starter has hinged cells that open like a book so you can inspect root growth or remove the plant for transplanting.
Roots are automatically air-pruned to create a denser root mass, and grooved sidewalls direct them straight down to minimize spiralling. Seedlings slide out easily, avoiding damage to the root system and associated transplant shock.
Cells are 5" deep by 1 1/2" square. The reusable plastic set includes one 14" × 8 1/2" × 3 1/2" deep frame to hold the cells, eight four-cell books (for a total of 32 growing cells) and a clear propagation lid. Seedlings can be watered from below by standing the frame in the lid and adding water.