Duke fruits earlier than most blueberries. It has light blue coloured fruit which is tasty and slightly tart. Also Duke is a bit higher producing than other varieties and the size of its berries is on the larger size. All blueberries prefer acidic soil so check out some soil additives you can utilize to give them good ground to grow in.
Cold Hardiness - Hardy in temperatures down to -34C. Sizing - It is called a 'highbush', so it can grow anywhere from 4 ' to 5' tall. Location - Full sun to 50% shade, moist to dry conditions, wind hardy.