Buy first,seed later maybe. Hubby got hooked on hostas and now has a flourishing shade garden under the tree next to the garden. The variety of hostas is amazing and like peppers you always find another one you have to have. They can get huge too, as in about 3-4' across, beautiful and easy to maintain. You will like them.
They like shade and that's why I don't grow them - diametrically opposed to pepper/tomato growing. I simply don't have enough shady area to grow.......