This is the same system commercial growers use, right-sized for home gardeners. Expandable paper honeycomb creates 50 cells in which to start your entire garden off right. Roots grow freely through the open base and, when you're ready to transplant into the garden, pots tear apart easily. Plant seedlings, paper liner and all, directly into the ground and avoid transplant shock. Kit includes pots, holding tray, and handy clips that keep the pots expanded while you plant them up. Note: holding tray is perforated to promote drainage and aeration — use on a waterproof surface.