I'll take the plastic sheets off the connecting door between heated and unheated greenhouses pretty soon (Sammy, the greenhouse cat, will like that!), so I can start working over the bins and adding fresh earth in preparation for transplants - probably mid-April.
I've already turned off the floor heating, but may have to put the fans from house back on the next few nights, and close the flap over the seedling tent, as we're expecting colder temps. It'll go up and down for a some weeks yet.
