Cold-temperate Pinguicula seed stratification - freezer ?

[Plantpot]

I have some P. alpina, P. longifolia, and some P. vulgaris seed to sow.
I've read they require temperatures in the -10C to -0C range when stratifiying.

Could this be done in a freezer for part of or for the full duration?
I realise that the standard freezer is set at -18C, but was curious to know.

 

[Huntsmanshorn]

Yes, this can work. I do mine outside in the winter, but I realize that is not possible for everyone.

 

[hcarlton]

They don't need freezing conditions (at least vulgaris doesn't, but with it being one of the most cold-tolerant I'd assume the rest wouldn't either), but the seeds do need to be relatively fresh in most cases.