Your love for the warm, natural look of wood is understandable. In an urban setting of concrete and steel, a wooden planter box can be a beautiful, organic touch. However, whether it's a "bad idea" depends on several factors.
First, consider the pros. Wood is aesthetically versatile, blending with modern, rustic, or bohemian styles. It's also breathable, which benefits plant root health, and often more affordable than stone or metal counterparts.
The main challenges are durability and maintenance. In a city, wood is exposed to rain, sun, and temperature swings, which can lead to rot, warping, and fading if untreated. To make it work, choose a naturally rot-resistant wood like cedar, redwood, or high-quality pressure-treated lumber. Always ensure excellent drainage with holes and a gravel layer. Applying a non-toxic, water-repellent sealant annually is crucial for longevity.
For a truly low-maintenance urban solution, consider composite wood or metal planters with a wood-look finish. They offer the aesthetic without the upkeep.
Ultimately, a wooden planter box is not a bad idea for an urban setting if you select the right material and commit to simple, regular care. It can transform a balcony, rooftop, or patio into a serene, natural oasis.