I started some perennial/biennal seed in May, with the idea of planting them out in the fall. I figured, that way, all the plants that normally wouldn't bloom the first year for me, will bloom next spring. I've read different things about foxgloves, ( I started the excelsior type) some say they are very winter hardy, others say they should be kept in a coldframe for the winter. I don't have one, and would like to plant them right in the ground in Sept. I could always put them in my garage for the winter, but space is a problem. Will they make it through a NY winter outside?