I bought one (only one because I'd heard they were difficult to grow) yellow foxglove from Malmborgs a few years ago and while it might be described as a biennial (I don't know for certain) I have had it bloom every year so far. Maybe I have just been a very lucky girl!?
Kristy :)

I find Digitalis grandiflora truly is a 'no-care' perennial. Easy to grow and not fussy about soil. It reseeds well but not to the point of being problematic.

I am sure hardyplants.com would sell seeds for this plant and many traders would have this seed available.

Jan

I'm looking for colors other than yellow and bold markings on the inner surface of the flower.

Maybe I need to look again at the biennials and ask which ones reseed well...?