Absolutely! You can successfully grow delicious blueberries in an urban planter box, and getting the soil acidity right is the most critical first step. Blueberries require acidic soil with a pH between 4.5 and 5.5 to thrive. Start by choosing a compact, dwarf or half-high variety suited for containers, such as 'Top Hat' or 'Sunshine Blue'. Select a large planter box—at least 18 inches deep and wide—with excellent drainage.
Fill it with a potting mix formulated for acid-loving plants, or create your own using peat moss, pine bark, and perlite. Avoid standard garden soil. After planting, mulch with pine needles or bark to retain moisture and maintain acidity. Water consistently to keep the soil evenly moist, using rainwater or distilled water when possible, as tap water can raise pH over time.
Place your planter in a spot that receives at least six hours of full sun daily. Fertilize with an acid-specific, slow-release fertilizer in spring. With the right acidic soil foundation and proper care, your urban planter box can yield a satisfying and sweet harvest of homegrown blueberries season after season.