Ruud, interestingly enough, the plants I got the seeds from still had green foliage at the time the seeds were ripe, even though the soils were quite sandy and our summer had been unusually dry and without rain. If I were more bold, I’d head out into the woods, away from human habitation, and dig one of these things up to see what the root system in nature looks like. Do it’s roots head deep down into the soil, or do it’s roots spread out sideways like most peonies do ? I imagine the trick would be to avoid the temptation to water this thing during the summer, even though other garden plants would seem to be suffering from a lack of precipitation. Bob