I suspect your seed packet is correct. This Johnny's Selected Seeds page

says "Chill seed at 40-45°F (4-7°C) for 1-2 weeks prior to sowing in the greenhouse." In some locations they are apparently sowed outside in the fall to get cold weather exposure.

ZM

My guess is that larkspur also benefit from stratification. Maybe some poppies.

Yes, Larkspur and Poppies as well - interesting.

Many many annuals benefit from stratification! I don’t think it’s as necessary with annuals but after reading university extension articles about it, they speak a lot about better quality and QUANTITY of flowers ... The orlaya that I allowed to self seed in the fall where I live in Ontario Z4, is already sprouted w 2-3 leaves ea. In the middle of April ...and there is still snow! Mind you, they are tiny but at least have germinated -which can be issue for this prickly little seed...

I don’t know if Orlaya is considered a hardy annual maybe?

I have collected seed from last year stored in a cool basement that I have been stratifying in the fridge now for a couple of weeks and will also just throw some straight in the garden to measure the difference... I’m sure the latter will take the longest to get going but Orlaya definitely is a great little flower to succession plant , I never want to be without them they are so bright white and beautiful!

I’m not sure, but i do think they need light to germinate as well, maybe somebody here can confirm ? Seeds left from last year’s plants were just pressed into the topsoil before I mulch with leaves for the winter ....and those are the ones that have already germinated -in a freezing cold month! So they also don’t need bottom heat to get going !...and because they are a tap root like Queen Anne’s lace, i would not bother starting them inside where I live..

(Does anyone else have problems on this site correcting/editing their comment in real time? )