Potting up seedlings
I have seedlings in small baking tins. They were planted on Feb. 15th and now have their first true leaves. Each baking tin has about 15 seedlings. They are ready to be transplanted to growing pots but the weather is really awful here. I normally pot them up and put in a greenhouse but am afraid that the cold weather will hurt them because I have no heat in the greenhouse. How long can I keep the seedlings in the baking tins before potting up without hurting the plants?