My popcorn (Blue Hopi) and sweetcorn (Earlibird) went into a heated propagator on Monday evening in 3" pots, a total of about 50 in th eend.... the Hopi has started showing already (as of last night)...
One of the gherkins that went in the same time (also sowed squash, outdoor cukes and several beans but the beans have no heat) is also showing, but it didn't have heat until Tuesday when I got another cheapo heated propagator from B+Q (12.99 for a one-tray 8W fixed output unit).....
chrisc