Growing the Berries. Blueberry bushes can be quite large when mature. While highbush berry bushes tend to be smaller, a rabbiteye can grow up to 15 feet tall and 10 feet wide. Use a 7- by 7-foot area for planting rabbiteyes and a 4- by 4-foot area for highbush blueberries.If you wish to grow them as a clustered hedgerow, you may take this down to 3 feet for highbush and 5 feet for rabbiteye. Plant blueberries in full sun in soil that drains well through 18 inches deep.roper Location. Florida's soil is generally low in organic material and tends to be sandy, which means you need to amend the soil to keep blueberries happy. Incorporate an organic material, like peat moss or compost, into the top 8 inches of soil.