QuestionsHow to growGreenhouse GrowingSkills of Greenhouse growingwatering woes 0 Vote Up Vote Down elaine harrington asked 9 years ago my neighbour has asked me to water his pepper plants in his green house whilst he is abroad however the solution of fertiliser and water has now depleted will it be ok to use just water 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Yes, just keep them nicely moist. They probably have enough feeding for now anyway.