Why won't my nasturtiums germinate?

Funny thing, for the second year in succession it appears that my nasturtiums aren't going to germinate. Can it possibly be because I have tried to start them off in something like 2" X 2" 'cells'? Not one came through last year, and this year I even tried soaking some (but not all) overnight before sowing. Or is it simply that they do take quite a while?

Many thanks

Neil

 

They can takes ages, then all of a sudden make an appearance. I sow them straight in the ground and then usually forget about them.