Growing on young Cucumber plants

[plantmark]

I am wondering what is the best thing to do with my Cucumbers in an effort to maintain the correct overnight temperatures.
I sowed 5 seeds in one pot 28 April and they popped through yesterday having maintained 20°C on the windowsill. Should I transplant to seperate pots immediately? My concern is where to place them to grow on. Seedlings dont generally do well on my windowsill as I dont think they get enough light and I think they would certainly get too hot. I prefer to put them in the greenhouse but I am concerned about low temperatures overnight, as the recommended minimum is just under 15°F and cost of electricity to achieve that with a heater would not be an option. I could keep them in the greenhouse and place them in the propagator overnight but that could be too damp and I am concerned about Mildew. Or should I just take a chance and leave them in the greenhouse.
Interested to know what others do?

[poohpouri]

where abouts in the country are you? it would help

[plantmark]

I am in Essex.

[poohpouri]

I'm in Enfield,middx just by junc 25 on the M25, I planted mine in the green house(unheated) and they are doing fine,I would suggest putting them in the greenhouse during the day so hey can start getting use to change and then gradually leave them overnight

[plantmark]

Originally Posted by poohpouri

I'm in Enfield,middx just by junc 25 on the M25, I planted mine in the green house(unheated) and they are doing fine,I would suggest putting them in the greenhouse during the day so hey can start getting use to change and then gradually leave them overnight

Thanks for that.