Probably this pellets are a clever and space saving creations, but didn't work for me. I planted 5 types of tomatoes in them. After they had sprouted and went on growing 4 out of 5 suddenly started wilting. I did water them and it was well before their roots started showing through. I replanted the strongest ones (took them out of the case and out of peat mix) and they seem to be better now. Don't know how to explain the failing of those 4 types of why 5th is OK but I will not be buying them again.