Choosing the perfect urban planter boxes for your space requires careful consideration of several key factors. Start by measuring your available area precisely - note the length, width, and height restrictions. Consider what you want to grow; herbs need 6-12 inch deep planters while tomatoes require at least 18 inches depth.
For balcony gardens, ensure your planters won't obstruct walkways and check weight limits. Rectangular planters maximize space against walls, while square planters work well in corners. Leave adequate space between planters for air circulation and maintenance access.
The material matters too - lightweight fiberglass works for balconies with weight concerns, while wooden planters provide better insulation for plant roots. Don't forget drainage holes and saucers to protect your surfaces.
Measure twice before purchasing and consider creating a mock layout with painter's tape on your floor. Remember that larger planters retain moisture longer but are heavier to move. Start with versatile medium-sized planters (around 24x12x12 inches) if you're uncertain, as they accommodate most urban gardening needs while remaining manageable in compact spaces.