Check HiramQuick’s post # 143 on this thread - he knows about potato growing and there is some very good info in that post.
Well, they predicted 41F last night for my zip code in the Colorado mountains and we got 36F and rain/snow mix. I did not trust the forcast so covered the new tomatoes and peppers that I already put in the ground with a clear plastic draped over some horizontal poles to form a tent. I also brought inside the plants still in containers that I was hardening on the deck, but did not plant yet as insurance against a late freeze. It has now turned to rain only and 37F but, I think i will leave the clear plastic tent over the rows to collect some warmth on this overcast and rainy day. Tonight’s forecast is 36F and I don’t trust it either. Any warmth I can get into the ground should help tonight if it freezes.