i don't think it is over watering...i have watered them once since I got them this past tuesday with distilled water and house and garden nutrients. right now the two kali mist plants are about 10" tall and the grapefruit is about 13". I guess looks are deceiving, because the pots are 10 gallon pots. I just put them in there on tuesday when I got them all.....does that help at all?