Fruits

How to Plant, Grow, and Care for ‘Duke’ Blueberries

The ‘Duke’ blueberry variety is grown for its prolific production and ability to withstand cold. Gardening expert Madison Moulton explains how to take care of this blueberry bush best

Growing fruits reliably can be tricky for gardeners in colder climates. There....

is a balance required— some plants need a certain amount of cold exposure to fruit successfully, but too much frigid weather can damage some species.

Blueberry lovers in colder regions won’t need to worry when growing the ‘Duke’ variety. This northern highbush is one of the hardiest blueberries available, suitable for frosty regions around the United States.

They are also easy to grow when following these simple guidelines.
What Is It?
‘Duke’ is a northern highbush blueberry variety known for its cold-hardy nature. These shrubs don’t mind a little chill, growing in USDA Zones 4-7. They produce flowers a little later in the season, avoiding issues with frost and ensuring cold-region gardeners don’t have to worry about frost protection.

Although flowering is later, this variety is also one of the earlier producers. You can typically start harvesting berries at the beginning of summer, unlike other varieties like ‘Pink Lemonade’, which only start ripening in the middle of the season.

The bush not only has berries that ripen early, but it also produces mountains of them – agricultural researchers assert it is one of the most prolific producers you can grow. You won’t have a shortage of delicious purple-blue berries to snack on if you choose ‘Duke.’

Planting
Once you’ve purchased your blueberry bush, you’re bound to be excited to get it in the ground. However, it’s best to give it a little time to adjust before you plant. Changing environments are stressful for any plant, especially when they’ve been growing in optimal conditions at the nursery.

For the first few days, keep your ‘Duke’ blueberry in a partially shaded area in its container. Avoid areas with high winds, as this can increase stress. Keep the soil lightly moist but not waterlogged until you’re ready to start the planting process. Don’t wait too long either – they only need a few days to adapt and limit shock. Plant within the first week in the shrub’s final home.

Once your blueberry bush is acclimated, choose an ideal location for planting. Full sun is best for the highest possible yield, but these plants can also grow in partial sun.

Soil is an important consideration, as blueberries are acid-loving plants. They won’t be happy in soil with a pH above 5.5 and prefer an even lower pH around 4.5 for the best possible growth. Test your soil and amend it until you achieve the right pH before planting.

With your location identified, start digging the hole. It should be around twice as wide as the container and only slightly deeper, encouraging the roots to grow outwards into the soil. Lower the bush into the hole and plant at the same level it was at in the container, filling in the gaps with rich soil mix.

Press down around the base of the plant to settle the roots in place and remove any large air pockets that may require a soil top-up. Water immediately after planting to prevent any further stress and encourage the roots to stretch deep into the soil.

If you’re planting another blueberry bush simultaneously, leave at least 5 feet of space between each plant. Overcrowding can increase your risk of disease in both plants and increase competition for resources. However, growing multiple blueberries will improve pollination and overall yields.