"John"
I am assuming that you are refering to a cultivated variety
of Digitalis Purpurea.
Ideally they should have been sown much earlier, but as there are so many
seeds
in a packet, I think you could experiment by sowing a few.

Thanks, John. I have just sown some in my unheated greenhouse because, like
you say, it's worth a try. The pack says they can be sown directly outside
in September, so I figure my unheated greenhouse will probably be much the
same.