You need to know if they're highbush or lowbush.
Growing Highbush Blueberries.
Or here.
I don't know much, except that everybody here burns the fields in the fall. I guess it kills the weeds, and the berry plants like it.
They grow wild on my property, I just pick 'em.
All the packaging says is, 'Blue Crop'. LOL Not much to go on. It says they'll top out at 6', tho - highbush, I guess?