Originally Posted by Taz

Use seed trays with propogator lids, sow in cells but only use
two-thirds of each cell pack. If it looks like a cold night, put a
lidded jar of hot water in the spare third to keep the seeds warm.
Alternatively, cover them with fleece or bubblewrap while the heat of
the day is still there.


Have a look at this website - I've found it invaluable.

http://www.powen.freeserve.co.uk/

Good luck!