they work as described
"we did a test to see if there was any noticeable benefit to using these in out greenhouse operation and they did work as described but we had better starts and growth with using our farm produced/processed compost in pots as opposed to using any of the preformed starter media. We use hydro-trays to water/feed/control light for our seedlings and had all trial trays side by side in the greenhouse for as close a test as possible"





