When designing an urban garden, the choice between many small planter boxes versus a few large ones depends on several factors. Small planters offer greater flexibility. You can move them easily, create diverse plant groupings, and experiment with different species. They are ideal for balconies with weight restrictions or for renters who may need to relocate. However, small containers dry out faster and may restrict root growth for larger plants.
Large planter boxes provide more soil volume, which means better moisture retention and more space for roots to develop. This is crucial for growing vegetables like tomatoes or deep-rooted shrubs. A few substantial planters can make a bold architectural statement and often require less frequent watering. The downside is their permanence; they are difficult to move once filled and can be costly.
Your decision should balance practical considerations with your aesthetic vision. For maximum impact with low maintenance, a mix of both might be the perfect solution. Use large planters for focal points and small ones to fill gaps and add seasonal color.