Arranging urban planter boxes to capture the most sunlight is key to a thriving container garden. The single most important step is to conduct a 'sun map' of your space. Track how sunlight moves across your balcony, rooftop, or patio over a full day. Note which areas receive direct morning sun, harsh afternoon rays, and are in shade. Once you understand your unique light pattern, you can position your planters strategically.
Place taller plants and boxes on the north side of your arrangement (south side if you are in the Southern Hemisphere) to prevent them from casting shade on smaller plants. Utilize vertical space with tiered plant stands or wall-mounted planters to elevate containers into the sunniest spots. For rectangular spaces, orient the long side of your planter boxes to run east-to-west; this ensures all plants along the row get more equal light exposure.
Remember to rotate your containers every few weeks to promote even growth and prevent plants from leaning toward the light source. By thoughtfully arranging your planters based on a careful study of the sun's path, you can transform even a small urban space into a productive and sun-drenched oasis.