If you're gardening on a wooden deck, this is a critical question. The short answer is yes, using saucers or trays underneath your planter boxes is highly recommended and often essential for the long-term health of your wooden deck.
Wood is a porous material that is susceptible to water damage. Consistent moisture from daily watering or rain creates a perfect environment for mold, mildew, and wood rot. Even with sealed or treated wood, constant wetness will break down the finish over time. A saucer acts as a primary defense, catching the excess water that drains from the pot's holes, preventing it from pooling directly onto the deck boards.
Without a saucer, water seeps into the wood grain, leading to stains, warping, and structural weakening. This can result in expensive deck repairs or replacement far sooner than expected. Furthermore, the concentrated moisture can attract pests like termites.
However, it's not enough to just use a saucer; you must maintain it. Never allow water to sit stagnant in the saucer for extended periods. This can become a mosquito breeding ground and will still promote moisture transfer to the deck. The key practice is to empty the saucer about 30 minutes after watering. For larger boxes, consider using pot feet or risers inside the saucer to elevate the planter slightly, improving air circulation and preventing the pot base from sitting in water.
For optimal deck protection, choose thick, durable saucers that match the size of your planter. Ensure they are slightly larger than the planter's diameter to catch all runoff. Combining saucers with a high-quality deck sealant provides a robust, double-layer of protection for your outdoor living space, allowing you to enjoy your container garden without worry.