A belated thank you for your replies. I read them as I was dashing out the door for work and I forgot to come back.
The weather has been wintry this week, but it's supposed to be sunny and 11°C/52°F tomorrow, so I'll be doing some garden tidying-up tomorrow. I'll cut up some black garbage bags as a soil cover. I do have a cabbage moth problem. They were all over my turnips last summer, and everything else, come to think of it.

I'll have to figure out a way to cover my cabbage family veggies. Maybe some kind of frame with cut-up nylons or some other kind of netting. I guess I'll google around for some ideas.