I planted lots of Brassicaceae (cabbage-family) seeds a week ago. They are all cute little sprouts now. They are down in my hoop house with onion, beet, parsley, spinach, and lettuce seedlings. It’s cool, in the 40’s (F), outside today but bright sunshine. The hoop house is at 80F. My husband ran power down there the other day, so my fan is kicking in when the temperature gets to 80.
I love to be able to tend seedlings in on the hoop house benches rather than inside on my shelve under lights. I can see them easier, lots of space to move them around, I don’t have to carry each one to the sink for water. I can just splash water (gently) on them without worrying about the water that ends up spilling all over the floor.
The night time temperatures have been pretty mild here this past week. Most nights in the 40’s. A few nights have gone down just below freezing. On these nights I covered the trays with row cover, with the trays on the cement floor. They’ve been fine. I brought my new long heat mat (holds 4 trays) down today and so I can use that on cool nights now. I’ll put a timer on it so it’s only on at night.
Tonight, the forecast low is 19F. That’s really chilly. I don’t want to risk it, so I’m planning to bring the five trays inside the house just over night. The rest of the week seems ok (between 28 and 40F) for them to stay in the hoop house on the heat mat with row cover.