Viewing post #2648053 by CaptObvious

Hembrain said:Even without an additional heat source, the covering keeps the frost off. Just a few degrees warmer plus frost protection can add meaningful extra time onto both side of the growing season. But if one wants to grow tender material through winter, the high tunnel will need heat. And if one wants to grow tropicals in there... well, that's another story- unless you live in Florida. Yes, I'm jealous of you Floridians and Gulf coast dwellers, but only in winter, and only a tiny bit!

@CaptObvious, do you have a system for heating or are you leaving it up to mother nature? And what are you planning on growing?

Based on what I've seen on temp monitoring system over the past few cloudy days, it's cooler in the high tunnel and cold frame than outside. Nights are the same, cooler inside the tunnel than outside. Currently, at 8pm EST it's 66F insode the tunnel and 70F outside. (It is unusually warm for this time of year.)

I've been growing wiinter veggies in the cold frame, brussels, broccoli, cauliflower, and they're doing well, but we haven't had but one or two nights close to freezing. Planning summer veggies for the high tunnel, tomatoes, squash, cucumbers, etc. No heat but the sun.

Photos of each below. Just glazed in the tunnel a few days ago. Early photo of the cold frame, which now has glazing on the ends.

[url=https://www.flickr.com/gp/117800205@N05/dsL36j]



Larry