How long to leave ungerminated seeds?

[Bill HH]

I sowed 70 sweetcorn (Sundance) and 20 Sweet corn (Swift) the Sundance have only germinated 50% I am still waiting for the rest but its looking unlikely now as the ones that did germinate are 2.5 inches high. The Swift however have all germinated. Trouble is I was going to just plant ten swift in the poly to keep them away from the Sundance and now I don't have enough Sundance to fill the raised bed I have allotted to them. Next year it will be all Swift, too much faf trying to grow 2 varieties.

[esbo]

Well I have some in microwave boxes with a bit of tissue paper at the bottom and the seeds on top, hope that works,

And indeed it is working well about 3 of the smaller beans have sprouted, the bigger broad beans have no sign of life yet

This seems much better than using compost as you can see what is happening.