Cold weather nipping of potato leaves

Although I wasn't aware that we had had a frost here, my pot leaves just showing through were nipped and went purple/brown, There was some green at the bottom of the shoots and today, with the light rain, they look better. I am hoping that they were the first chits to surface so there should be others. Do you think they will suffer crop-wise..?

No frost was predicted but it must have been near to it. They are still looking better and today I have earthed them up as it is supposed to be colder in the nights here this next week.

If frost is predicted in your area either chuck a little extra soil over them..as earthing up...
or go to the expence of buying fleece....most of mine are now between 3 - 6" above ground...somes purplish....they are already earthed up...so if 'ole Jack nips a couple of leaves...they'll survive...maybe a few days late...but once on their way...they get there...

Have a good season....