Where should I plant this? Sun, shade, or little of both?

I am zone 8a and I planted mine in full sun and they did great.

Full Sun to Partial Sun. You can check out the varieties along with their requirements here:

http://garden.org/plants/searc...

Right, it really depends on where you are, as the sun is much more intense down here in Florida than it is in Kansas or Canada.

If I were planting them here, I'd have them in a few hours of morning sun, at most. At my brother's house in British Columbia they'd need the full sun, all day. At my daughter's in Utah, again just morning sun, because it's so blazing hot (and dry!!) in the afternoons.

Mine grew and flowered well with midday shade.

I am in Kansas City.