I'm still not sure what the watering requirements are for winter. While the trees are frozen, its easy - no watering. Otherwise, how often do we water in the winter? I'm still trying to figure out the difference of the feel of when the soil is moist or just cold. I know they don't need a whole lot of water, but assume they need something. Part of the reason for putting up the tent in the first place was to control the water and not subject the trees to the wet NY winters. In the tent, they don't really get rained on. We haven't really had any snow to talk about yet, just cold.