From what I read even the self-fertile varieties of blueberries will benefit in both quantity and quality of fruit by having another variety. You might want to consider about 2 varieties in containers or something along those lines.

Thank you. I was not aware of this. Is it possible to plant two bushes really close, something like 1.5-2 feet apart?
Olga

My reading says "yes" on the planting distance. Like a hedge, but with only two plants. The fields I've gone picking in have them planted 2'-3' feet apart. Should be fine, I'm thinking.