We popped ours the first week Jan and will be planted June 1st as we do each year up here.
You should till and nut'ed your garden space last summer/fall before the winter snows.
No tilling! Amend, compost compost compost, mulch, leave alone. Let the soil food web do its work and you won't be disappointed. Till all that up and the SFW has to be started all over again.
I have beans selected out to pop, but I think I'm gonna change my mind about running the Northern Lights in favor of either Grendel or Blue Melon. Fuck, now I'm back to square one, decisions, decisions.
By the by, if you're popping indoors now with plans to put OD, it's really helpful to have everything on a photoperiod that more closely mimics what they're going to encounter once OD. I've been using a staggered photoperiod for almost a year now, hopefully this year I can really test how well it
prevents flowering onset after placing outside. I have designed the photoperiod to most closely match the summer solstice at my latitude, which for me is about 13.4hrs if I recall.
I'm in the Sierra Nevada, 2500' elevation, and I can put them out anywhere from March to July with zero problems. If it's too cold they just don't grow is all.