I know it is hard to image this. We are under a heat advisory today in Louisiana. But, now is the time to start preparing your greenhouse for winter. Really, I am serious. You should be doing a check for all of your systems and tightening up for the cold winter months ahead. This is a really good article covering what systems you should be looking after. Even though this was written for commercial greenhouse growers, most of the aspects still apply to the backyard greenhouse grower. Although, I am not sure that there are that many of us that have a back up generator on our home greenhouse.