We dropped to 28 degrees early this morning, below freezing for 4 hours.
The greenhouse dropped to 29, below freezing for 2.5 hours.
As soon as the sun popped up the temperature rebound quickly. 32 outside now and 70 in the greenhouse. I had the horseradish on a lower shelf and a blanket over it, suspended on the shelf above. A couple leaves looked droopy, but it might have needed water too. So I watered it.
The thermometer I bought is useless. Bluetooth for 196 feet my butt. So no low temp alerts and I can't even see it on the app.
20 feet and my phone thinks it's out of range.
Also when the analog thermometers read 30 degrees, it read 24. Um. No.
So I'll get another security camera and train it on the analog thermometer and call it a day.
Tonight I'll test the frost blankets on the shelves and see what that buys me. If worse comes to worse, I can ALWAYS move stuff from the greenhouse into the workshop over cold nights and put them back in the morning. I just want to see how low is too low at the moment, as we'll be cold every night for a week.
Have a super duper day all.