Creating visual interest with urban planter boxes is all about playing with scale, height, and arrangement. Start by grouping boxes in odd numbers - clusters of three or five create natural harmony. Place taller planters at the back or center of your arrangement, using them as anchor points. Mix rectangular and square planters to break visual monotony, ensuring they share a common color or material theme for cohesion.
Consider the "thriller, filler, spiller" approach for planting - tall dramatic plants in large containers, medium bushy plants in mid-sized boxes, and trailing plants in smaller ones. This creates layers that draw the eye upward and outward. For narrow spaces, arrange planters in a zigzag pattern rather than straight lines to create depth and movement.
Don't forget negative space - leaving some areas empty between groupings allows each arrangement to breathe and stand out. Vary textures between planters too; combine smooth concrete with rustic wood or glossy ceramic for tactile interest. Remember to step back frequently during arrangement to assess the visual flow from different angles, ensuring your composition looks balanced from all viewpoints.