Hi All, I germinated some squash seeds, butter nut, onion, turks cap, acorn etc, some my mum gave me and these were doing just fine for a while. Last week after a couple of days in the cold frame, one by one they turns their toes up and died. They were watered with rainwater, kept a little on the dry side. On PM there is a good root system, no sign of aphid and no pinching at the neck where I would have expected to see if it was neck rot and that wasn't blackened. They haven't been overwatered and there's been no frost.
Has anyone any ideas on why this could have happened?