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Additional Posts in Houseplants and Gardening
I NEED MORE PLANT PICS ON HERE!
My office plant pride and joy 😍

My small bear paw is making small flowers 🥺🐾

My gorgeous haworthia is glowing this morning 😌

My green friends

Lots of sunshine this week.
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Bowl Leader
Did you just move them from indoors to your greenhouse? If yes they're probably suffering from transplant shock. Just baby them and make sure the humidity is normal. They'll adjust.
Bowl Leader
Gradual hardening off. You should have moved them outside for about an hour or two and then gradually increased the time rather than putting them straight in the greenhouse. Or you could have started the seeds in the greenhouse so they would be adapted to the area, but you still would have to harden them off to plant them outside. These are looking pretty bad and I don't know how many will survive.
Bowl Leader
Did you just move them from indoors to your greenhouse? If yes they're probably suffering from transplant shock. Just baby them and make sure the humidity is normal. They'll adjust.
Pictures would help with diagnosis if you can provide
I don't have any personal experience, unfortunately, I start my seeds indoors.
If it were me trying to figure out a greenhouse on the fly, I'd pick up a cheap wireless outdoor thermometer (<$20) and stick the sensor on the plant shelf in the greenhouse so I could keep an eye on the temperature from inside. If it gets too hot, go out and open a window or something. Eventually I imagine I'd find a routine or setup that works with less monitoring.
I know for greenhouses with rigid frames there are inexpensive devices that will automatically open a window when they get hot - entirely powered by thermal expansion, no batteries needed. But from the photo it looks like you have one of those tent-style greenhouses, and I don't know of anything automatic for those.
Bowl Leader
Yeah they didn't have enough time to acclimate. You should have moved them outdoors only for a few hours in the morning. I would try to move them back into your house and then look up how to harden off plants.