I use 20 gallon pots when the plants get bigger. I do start with smaller pots. I try to use light colored pots. And I live in Michigan! I would never use black, the summer is just too hot here. Keeping an acidic environment will probably dertermine yield. Some grow to 9 feet, most 4-5 feet. Except Sunshine Blue a smaller plant. Excellent cultivar though. I don't have one, but want one. My area is so different Northern Highbush work better for me, but I would go with Southern in your area. I do have some southern myself. My northern are in raised beds. A mature Northern in a raised bed can produce 20 pounds of blueberries. 5 pounds though is typical until they become monsters. Some overcrop enough to hurt the plant. More a problem in your area. Here with more extreme conditions plants usually do not over crop.
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