My wife and I built a greenhouse this spring (still in the process really) and put some tomato plants in it. The plants were tall and spindly while they were in the house (lack of light I'm told). Well, now they're nice and bushy, but are only now starting to show the starts of a few flowers. I'm afraid they got going too late to actually achieve any fruit before it gets too cold. I've had one day with a temp. of 88 and another with a temp. of 89. Is the greenhouse not hot enough or did we just get started too late, or maybe a combination of both.
We don't currently have any heat in the greenhouse...Realizing we've been blessed with warmer than normal summers the last few years, is an artificial heat source something we need to look in to for the "normal" Alaskan summers? We are about the same elevation as Service High School in Anchorage, so our ambient temp. is a little lower than it is at lower elevations.