I received packets of seed for Calochortus bruneaunis and Calochortus leichtllinii during the surplus round, and am wondering how to handle them. Lately, overnight temperatures have settled either side of freezing, with daytime highs forecast to range between 41 and 50 F for the next two weeks.
Calochortus seeds are totally new to me, and I couldn't find much information about a germination protocol for them. Do they require stratification? I figure I have three options:
1 Sow immediately in a gritty mix, and expose to the elements (they may not get enough of a chill to germinate)
2 Toss the seed and some lightly moistened vermiculite in a ziplock bag and refrigerate for a period (how many weeks?) then sow once the seeds germinate.
3 Refrigerate the seed packets in a ziplock bag, and wait till autumn to sow them, placing the pots in an unheated greenhouse for the winter.
What would give me the best chance at success?