1630 Linden Dr. Room 183 Therefore, try to maintain a moist, but not wet/soggy, growing medium. This will help them retain moisture in the summer and stop them from freezing in the winter, he added. A complete inventory of University of Wisconsin Garden/Farm Facts/Pest Alerts is available at the University of Wisconsin-Madison Division of Extension Plant Disease Diagnostics Clinic website: https://pddc.wisc.edu. Mature blueberries need a … Alternatively, containers can be left buried in the soil as long as the containers have proper drainage holes and the site where the containers are buried is well drained and exposed to full sun. The blueberry is a wonderful fruit rich in vitamin C, dietary fiber, and vitamin E. Due to its popularity, there is a growing interest among gardeners to plant blueberries in backyard gardens. Blueberries do not like to have ‘wet feet’, but insufficient moisture can also be a problem. Mulch the soil surface with two inches of pine bark or chipped hardwood bark to conserve moisture. One of the most critical factors for successful blueberry production is providing an ideal soil pH in the range of 4.5 to 5.0. A 50/50 mix of potting soil and sphagnum peat moss should provide enough acidity. %%EOF In mid- to late October, bury containers in the ground at a site where snow is likely to accumulate and where plants will be protected from cold winter winds. Mulch the soil surface with four to eight inches of straw in mid-November or cover the bushes with burlap. h�b```c``�����`�� Ȁ ��@Q� k�v000��s�����"@���x�2��b� �2P�iç��� ��l\�ڌ�-_l���;\�d0h��r00�ia``qҜ�'!|�`�D�00ޟf�0 �>z During early to mid-spring, remove containers from the ground and place them in full sun. Leave the soil level an inch or so down from the lip of the container. Plant the blueberries into the containers at the same level they were in their nursery containers. Follow directions exactly to protect the environment and people from pesticide exposure. © 2020 the Board of Regents of the University of Wisconsin System doing business as University of Wisconsin-Madison Division of Extension. Avoid overapplying fertilizers, as blueberry roots are sensitive to fertilizer salt injury. Make sure to give your plant plenty of acid. Collected rainwater is ideal for watering, and typically is not as ‘hard’, nor has as high of a pH as well water. Highly alkaline soils that are clay or high in organic matter can be amended by adding large amounts of sulfur to lower the pH, but will require repeated amendments over time to maintain an ideal pH. Buried containers can be left in ground for over-wintering. To minimize fungal disease, plants should be placed 2 to 3 feet apart. If you plant your blueberries in a container, Pandian suggests a size that is 5 gallons or larger and bury the containers in the ground. Thanks to Laura Jull, Brian Smith, and Jessica Wickland for reviewing this document. This is a challenge in many parts of Wisconsin where soils are typically too alkaline (i.e., the soil pH is too high – above 7.0) for blueberries. Apply slow-release acid fertilizers (e.g., elemental sulfur) four weeks after planting in the first year and then top dress the growing medium surface lightly the following spring. References to pesticide products in this publication are for your convenience and are not an endorsement or criticism of one product over similar products. Low bush cultivars have a dwarf (i.e., maximum 12 inch height) and spreading growth habit and typically produce smaller fruit. 152 0 obj <>/Filter/FlateDecode/ID[<4603E43E79959440AFCF56E15DC90DA3>]/Index[135 31]/Info 134 0 R/Length 87/Prev 123068/Root 136 0 R/Size 166/Type/XRef/W[1 2 1]>>stream You are responsible for using pesticides according to the manufacturer’s current label directions. 165 0 obj <>stream Some popular half-high cultivars recommended for Wisconsin (i.e., hardy in zones 3 though 5) are ‘Northblue’, ‘Northsky’, ‘St. Cloud’, ‘Polaris’, ‘Chippewa’, ‘Northland’, and ‘North Country’. As the plant matures, repot it in a larger container (e.g., a 16 or 20 inch pot) or in a barrel, once again filled with the acidic soilless growing medium of your choice. Prevent rabbit damage by placing chicken wire fencing or hardware cloth around the bushes. Most blueberry cultivars are self-fruitful and do not require another cultivar for cross pollination (‘St. What cultivar of blueberry should I use? How do I overwinter my blueberry plants? A combination of supplemental liquid and slow-release acid fertilizers is recommended. endstream endobj startxref Therefore, attempting to lower soil pH may not be a viable option for backyard gardeners who have an elevated soil pH. As the plant matures, repot it in a larger container (e.g., a 16 or 20 inch pot) or in a barrel, once again filled with the acidic soilless growing medium of your choice. Frequent, light watering is ideal, with an occasional ‘drench’ to eliminate soil salts. How to Grow Blueberries in Wisconsin Selecting Cultivars. Mix all ingredients well. h�bbd``b`:$W�X}@��-�`�"n��� �HKD��3 !�H0s��* �( !$�``bd�� �3�}0 �� 1 Immediately water the pot thoroughly to settle the soil and eliminate any air gaps around the plant's roots. Madison, Wisconsin 53706 Make sure you follow the recommended rates described on the fertilizer label. endstream endobj 136 0 obj <. How do I properly fertilize my blueberry plants? If using drip irrigation, place two emitters in each pot on either side of a plant. Another way to reduce heat stress and water loss is to bury containers in the ground. Because containers do not provide adequate insulation from the cold, be sure to protect container-grown blueberries during the winter to prevent root damage. Select a well-draining, large weather-proof container like a wooden barrel planter. Growing Blueberries in Containers Containers planted with spring flowering shrubs that also deliver a hefty punch of autumn color are a stylish addition to the porch or garden. An EEO/Affirmative Action employer, University of Wisconsin-Madison Division of Extension provides equal opportunities in employment and programming, including Title IX and ADA requirements. Avoid dark plastic containers, as this can overheat the roots. As the plant matures, repot it in a larger container (e.g., a 16 or 20 inch pot) or in a barrel, once again filled with the acidic soilless growing medium of your choice.
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