Cold Frame

I took these photos on November 24, and the plants are stable. One kohlrabi plant survived the slugs but has stopped growing.  The base of the plant is not growing big enough to harvest , but I could eat the leaves. I picked some lettuce ahead of the cold snap. 

I've had to weigh down this frame with some heavy rocks due to our hefty winds. I'll keep checking on the plants inside, even as I fear their days are numbered with an especially cold snap (single digit lows!) beginning Thursday/Thanksgiving night.