My tomato seeds still haven't sprouted.

[Wishin']

Wishin - do you have any way to put a heat lamp or mat or Christmas lights under them in the greenhouse? Or could you start them inside your house on top of the refrigerator or water heater or under an old incandescent bulb that puts off heat? Good luck!

Unfortunately not, I don't have a lamp or mat, there is no electric at the greenhouse (so I can't use the Christmas lights,) and the house is colder than the outdoors. It can be t-shirt worthy outdoors while you need to still wear sweats indoors

 

[so lucky]

Could you put them in your car during the daytime? The greenhouse effect might help them get warm enough to sprout. Night time, I would put them in the house.
Don't beat yourself up, though. I have a warmish house, and some of mine haven't sprouted, either.

 

[Smart Red]

Heated rocks or hot water bottles under a plastic cover might be enough to keep the nighttime heat close to the seeds in the greenhouse. They wouldn't need electricity.

 

[Wishin']

Well, those tomatoes made a liar out off me. I go over there today and two sweet 100 have sprouted, 1 campbell 1327, and 1 roma. Come on campbell 19

 

[thistlebloom]

Yippee Wishin'!

 

[lesa]

Seems just about when you give up...they sprout!