Digitalis grandiflora here is definitely biennial. In some gardens it will survive for longer. The yellow Digitalis lutea is perennial even for us.

Thanks Owdboggy, I bought it as a 'perennial' digitalis grandiflora but I think it's a biennal grandiflora. Blimming labels, but they were lovely and I will collect seed this year. Hopefully there'll be some selfsown babies.

Biennial for me too though I did deadhead before it could set seed one year but that horrendous winter put paid to it.
I agree about D lutea, a slim plant with good deep green foliage. I have it in moderate shade in poor soil.

Yes biennial. I haven't been successful with seeding but will try harder!
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No selfsown babies by the looks of it unfortunately but thanks Sbg and Rm, will try seeding.