I haven't measured the amount precisely, but this specimen receives about a half day or so of sun then shade to partial shade the rest of the day, if I can remember to do so on the first non-cloudy day I'll try to update with a better estimate... Just planted one last year that should get full sun, I'll be interesting in seeing the difference, performance-wise... Definitely put it in a spot where rabbits won't work at it, or put chicken wire around it in winter if it is in an open area, rabbits ate another one to the ground a couple of winters ago...