???? ? ???? wrote:
I always notice that quite early in the season, tomato seeds will be
springing up all over the greenhouse soil, and they will be sturdy and
dark green, they didn't want incubating"!

The strongest tomato seedlings I've got this year are the 2 that came up
self-planted in an orange tree after the orange tree was brought indoors. I
don't think it's the temperature so much (as it will have germinated at the
same 'cool, indoors' temp as all the rest, but it /has/ been sitting in
slightly damp soil for a good few months longer than those that were
actually deliberately planted.