Q.watering a plumbago
how much water do they need or how often? So far, It seems to me like they barely need any and too much starts causing mold problems, is that true?
Plumbago generally needs frequent watering, enough so to just keep the soil moist, but do not over water. In fact, it's okay to allow the soil to dry out some between waterings. Jatropha is known for its tolerance to drought and, thus, requires less water. Give it a good soaking to saturate the soil well and then leave it, watering again only when it's really hot/dry as needed.