Weird leaves...please help

Two of my plants have something going on with the leaves. They are Satori seeds from Mandala seed company. They are about six weeks old. They are in a mixture of MG organic and Bumper Crop (which is a soil amendment that includes worm castings). They look really healthy except for these leaves so any help would be appreciated

what are the temps in your grow room?

Didn't realize until too late that I put this in the wrong section. Should've been in Plant Problems.

The temperature is pretty low. They are in the basement in the northeast US so it's been around 40 degrees outside. I've been meaning to get a heater but I just lack the funds right now.