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cmpman1974

Flowerhouse Portable Greenhouse

cmpman1974
18 years ago

I live in Michigan and have one of these portable greenhouses. It is unheated. Our last frost is predicted to be 5/12. I have a bunch of lettuce and cole crop seedlings started and under lights. I want to put up the portable greenhouse tomorrow. I plant to plant the lettuce around 4/15 and the cole crops 4/22 or 4/29.

Night time temps still are in the high 20s, low 30s most days. Average daytime temps are mid 30s, low 40s on average. It is getting warmer next week, but who knows..

How much frost protection do these portables provide w/o heat? For example, 10 degrees? Lettuce and cole crops are pretty safe down to 35 degrees. I also wanted to harden off a tray of pansies.

Do you think if I put them out there at night with the windows zipped, I'll be OK? Anyone in Zone 6 who has experimented, please let me know. I am very interested in this answer as soon as possible. THanks!

Chris

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