This year, while touring a botanical garden, I saw several varieties of hosta planted in full sun. They were not scorched nor wilting. So much for the theory of hostas being solely shade plants.
If you decide to try growing hostas in the sun, there are some varieties that will do better than others. Gold leaved plants and heavily variegated specimens, more white or cream than green, can tolerate sun if the soil is moist. REMEMBER: ADEQUATE MOISTURE. Some hostas, though, may still scorch, even in moist soil.
Blue leaved or solid green varieties tend to scorch, even in moist soil.
I have two hostas that are very similar in foliage, the photo above is one of them. They are planted on the east side of a fence where they receive at least six hours of direct sun every day. This is a moist bed, the last to dry in the entire yard, which could explain why both seem so happy here. I only wish I could remember the names of them. They were purchased a few years ago when they were new introductions but the tags have disappeared long ago. ("fire" is part of the name) If anyone recognizes this variety, please let me know in the comments section.
Some varieties you may consider are:
Sum and Substance
Check your local garden centre for further suggestions of sun tolerant hostas. There are some varieties like August Moon that some direct sun exposure will emphasize more yellow tones.
If in doubt, plant in a part-shade garden, with morning sun and afternoon shade, remembering the sun is at its strongest between 11 am and 4 pm. Note: The southern states' sun may be far too strong for any hosta in full sun.
* I am participating in Mosaic Monday today. Stop by for more mosaics. Mary's blog, Little Red House, has some magnificent photography. Take your time and browse around. You can tell her "The Gardening Life" referred you.