I collect water rain water all summer long so as to not have to use the "bad" water on my plants. Rainwater just has that extra thing I cannot explain so I really hesitate to use my tap water for watering. I have a 400 gal. cistern as well as numerous large pails around the house so that I just have to dip my waterer in and water the kids...It just rained here the other day and I could hear the plants singing!!!! SW FL is dry in winter and it has been quite cool...got to 28 the other eve.