This is a common question for urban gardeners. The short answer is: yes, it is highly recommended to seal the inside of wooden planter boxes. While it adds an initial step, sealing provides crucial protection. Wood is porous and constantly exposed to moist soil and water, leading to rapid rot from the inside out. A waterproof sealant, such as a pond-safe epoxy or a specialized planter box liner, creates a barrier. This dramatically extends the lifespan of your planter by preventing wood decay. It also helps retain soil and prevents leaching of any potentially harmful chemicals from treated wood into your plant's root zone. However, ensure any sealant used is non-toxic and safe for edible plants if you're growing vegetables or herbs. For optimal results, also seal the exterior to protect against weather. This simple step is key to maintaining a beautiful and functional urban garden for years to come.
Do you need to seal the inside of wooden urban planter boxes?
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