My Celosia are ready to prick out (realise I planted slightly late from teegees calender, but am hoping they will catch up). Once put into separate plugs would they be okay in an unheated greenhouse? Night temperature doesn't seem to be going below 4 degrees C?
If in doubt, then cover them with an extra layer of plastic or fleece at night, we could still get a cold snap.
I am always making little tents over little plants in the greenhouse.
I have use plastic bags, with wooden skewers as tent poles.