Sorry, not quite what i meant. I dont really need to warm the soil up first, and cloche -ing would be impractical. I was kind of asking if it was OK to carry on planting when its frosty at night. I still have loads to do.
I guess its a bit of a novicey question, and i am not exactly a novice but with these sharp frosts coming so early this year (i reckon the earliest since i started gardening - about 6 years), i have not really been in this position, or maybe i am thinking and worrying too much - perhaps in the past i have just done it without thinking about it.
A case of ignorance is bliss, and a little knowledge dangerous, maybe?