Sounds like a perfect candidate for winter sowing. You’ll get better results sowing in containers and transplanting rather than direct into the meadow. https://www.houzz.com/discussions/winter-sowing

M. fistulosa doesnt require a cold stratification period and can be sown outdoors any time in spring. They’ll germinate with warming temperatures.

Update 2024: I never got around to sowing them out in the pasture back in 2022, but I did germinate them under the lights this year after about a month of cold stratification in the fridge. Easy as anything, even with 2-year old seed, and now potted up into large containers. I'll transplant them out into the pasture after DH does the mid-June cut-down.