When setting up an urban garden on a balcony or patio, a common question arises: do planter boxes need saucers underneath them? The straightforward answer is yes, in most cases. Saucers serve a critical function by catching excess water that drains from the soil, preventing it from staining wooden decks, damaging concrete, or dripping onto neighbors below. They are essential for maintaining good relationships in multi-story buildings and protecting your property.
The key is not just using any saucer, but using one of the correct size. A saucer that is too small will overflow, defeating its purpose, while one that is excessively large can be cumbersome and collect too much stagnant water. So, how big should the saucer be?
As a general rule, your saucer's diameter should be at least 1 to 2 inches wider than the base of your planter box on all sides. For example, if your planter is 12 inches wide, aim for a saucer that is 14 to 16 inches in diameter. This provides a sufficient catchment area without being overly large. The depth of the saucer is equally important. A depth of 1 to 2 inches is typically adequate for most planters, allowing it to hold a meaningful amount of water without becoming a mosquito breeding ground.
Beyond size, consider the material. Durable, UV-resistant plastic, resin, or metal saucers are excellent choices for outdoors. Always ensure the saucer is waterproof. After watering your plants, make a habit of checking the saucer 15-30 minutes later. If there is a significant amount of water, pour it out to prevent the soil from reabsorbing it and becoming waterlogged, which can lead to root rot. This simple step of emptying the saucer is the cornerstone of healthy container gardening. By using a correctly sized saucer and managing the overflow, you can enjoy a lush, vibrant urban garden that is both beautiful and responsible.