Absolutely! Growing blueberries in urban planter boxes is not only possible but can be incredibly rewarding. The single most important factor for success, and the answer to the second part of your question, is a resounding yes—they absolutely need special soil.
Blueberries are acid-loving plants, thriving in soil with a pH between 4.5 and 5.5. Standard garden soil or generic potting mix is too alkaline and will stunt the plant, leading to yellow leaves and no fruit. You must provide an acidic soil mix. You can buy a pre-mixed "ericaceous" compost or create your own using peat moss, pine bark, and a little perlite or coir.
Beyond the special soil, here’s your quick guide to urban blueberry success:
1. Choose the Right Container: Select a large planter box, at least 18 inches deep and wide. Ensure it has excellent drainage holes.
2. Pick a Sunny Spot: Blueberries need a minimum of 6-8 hours of full sun daily to produce sweet fruit.
3. Water Consistently: Keep the soil consistently moist but never waterlogged. Using rainwater is ideal as tap water can be alkaline.
4. Select a Variety: For containers, look for dwarf or half-high varieties like 'Top Hat', 'Sunshine Blue', or 'Pink Icing'.
5. Feed for Acidity: Use a fertilizer designed for acid-loving plants, such as one formulated for azaleas or rhododendrons.
With the correct acidic soil and proper care, your urban planter box can become a source of delicious, homegrown blueberries for years to come.