posted 5 months ago
To preface: I'm in zone 6 as well, right on the border between 6a and 6b, with weather pretty much like yours (eastern PA). I live halfway down a steep north-facing slope (600-ish vertical feet of mountain to the south of me), so I don't get as much overall light as somebody on flat land. Both types of plants went directly in the ground for me, never tried any kind of container or even a raised bed.
My personal experience with mint root: I planted it on the south side of my peach tree in a space that gets maybe 8 hours total sun (would be more but the peach branches cast dappled shade in the middle of the day). Only like two of them put up any top growth. The year I did it was pretty wet, so I didn't need to do any additional watering. They seemed healthy before the fall dieback, but nothing came up the next year. It made me very sad, but I justify it by telling myself I wouldn't have liked eating them anyway.
My personal experience with myoga: The first set of roots I bought are doing okay, despite being planted in terrible, barely-improved heavy clay and shale soil. It didn't help that I planted them upside down, which I only realized when I accidentally dug one up a month later. Despite that, they did send up some spindly shoots and one or two edible buds that first year. They're in part sun with a western exposure, between an elderberry and a juvenile apple. I didn't want to move them because they just weren't very robust, so I bought more last year (I think 2 years after my initial purchase, maybe 3?). These I planted in much nicer soil, right at the dripline of a huge (15' tall) Rhododendron on the eastern side of the house. They get 6 or so hours of full morning sun, then shade for the rest of the day. Even though this past year was hellaciously dry, they thrived. I harvested a dry pint of buds and let twice that amount go to flower (some intentionally, but most because I missed them until it was too late).
So here's what I think worked better for my myoga: morning sun/ afternoon shade; loamy, consistently moist soil with a slightly acidic pH; no competition from mint (the western patch is in an area of moderate mint encroachment). There was definitely deer browse on both, but I fenced off the newer ones so that probably did give them a leg up. I also let the chickweed and clover grow in both patches as a kind of living mulch because I only have limited mulching material and they're low priority areas; nevertheless, it seems to work.