Starting Good King Henry now

I was just gifted some Good Job Henry seeds. I see online that it’s recommended to cold stratify them for 10 weeks (!) and then move them to pots to start indoors 4-6 weeks before last frost, before finally moving them outside. I’m wondering if there’s any reason I can’t start this process soon, which would end with planting outside approximately late august or September. My goal is to get it established sooner rather than waiting another year to be on the typical schedule. Is there any reason I shouldn’t do this? Will it harm the plant having temperatures drop only a month or so after planting outside? I’m in Montreal, Canada.