Hey there Chaddy! Thanks for the comment! I don't water these guys too often. I have them growing in a concrete planter that I made so its pretty porous and when I water, I just drench it and allow it to dry out. During winter, once every three weeks sounds fine, I *think* that is right about what I do. I keep them in the greenhouse, and it is still pretty warm. How much light do you get at the windowsill? I have mine in the greenhouse and they get sun pretty much all day.