QuestionsHow to growTrees and ShrubsWateringwatering plants 0 Vote Up Vote Down Martin O\’Sullivan asked 15 years ago Is it advisable to water plants this time of year during the dry cold period? I have mostly heathers growing. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago There is no need to water plants in the open soil but plants in pots could be very dry.