Something I never counted on when we built the greenhouse, was using it in
summer. Fall, winter, and spring, yes, but summer is just too hot. For
example, the hottest day so far this month has been 91°F (33°C). This was the temp inside the greenhouse . . .
The solar attic fan helps, but it's still too hot to grow things. Plus, since
the greenhouse is built off of my sewing room, the heat transfers through the windows and walls so that room gets really warm too. Which in turn, helps heat up the rest of the house. My idea was to cover the greenhouse with shade cloth.
It's graded at 90% shade and measures 12-feet by 20-feet. I got it on Amazon; here's the link for more info ⇾ QLOFEI 90% Shade Cloth.
We used cup hooks to secure the
grommets, with the help of baling twine along the bottom edge.
How much difference has it made? The first day after we put it up, we got to
89°F, (32°C). But the greenhouse temp only got up to 83°F (28.3°C). That's
about a 20°F difference thanks to the shade cloth. Obviously, I'm really glad we did this!
I also use shade cloth to cover my new transplants. They really stay happier the first few days until they establish their root systems.