I have a tray of tired looking supermarket "living lettuce". You're supposed to keep it on your windowsill and use it up over a week or two.
Can I treat the living lettuce as a tray of seedlings and plant it out? It would be under glass at this time of year, of course.
It looks a bit like a tray of seedlings you'd buy from a garden centre in the spring, but not quite as healthy and much tighter packed in (several plantlets in each pot).