Frost has been predicted for Friday, Saturday, and Sunday nights. Friday night, I covered the newly transplanted onions. I found no cold damage the following morning. In fact the Rouge D'Hiver lettuce has turned a brilliant red from the cold:
|Rouge D'Hiver Lettuce|
|Transplanted lettuce along the edge of the bed on April 19|
|After some cold nights|
I didn't worry about the other greens on Friday night because temps were predicted to hover around freezing. The Kale, Swiss Chard, Spinach, and Pak Choi in the same bed are more established and have already experienced cold temperatures. All are also under row covers which gives them a little protection.
However, last night and tomorrow night the temperatures are forecasted to be low 20s. I covered them all last night and will cove them again tomorrow night. Better safe than sorry.