Make sure that you are taking care of your glasshouse crops. I know that the sun does not shine much this time of the year, if at all.
However, you must protect your crops from draughts, which could kill off anything that you have growing there.
- the windows are locked
- seals are secure
- block off all draughts.
I have been going through my many books and one that I would not be without is
Royal Horticultural Society Gardeners' Encyclopedia of Plants and Flowers.
A treasury chest of knowledge.
There is one of sale on ebay right now for 0.99 pence = postage