Growing your own food in urban planter boxes is rewarding, but the material safety is crucial. Start by identifying your planter's material. For plastics, look for recycling codes. Codes #2 (HDPE), #4 (LDPE), and #5 (PP) are generally considered food-safe. Avoid using containers not originally intended for food, like old tires or treated wood pallets, as they may leach chemicals. For wood, untreated, rot-resistant types like cedar or redwood are ideal. Avoid wood treated with creosote or old-style CCA (chromated copper arsenate). If using reclaimed wood, know its prior use. Metal planters, such as galvanized steel, are popular but require a safe liner (like food-safe plastic) to prevent metal ions from mixing with soil, especially important for acidic-loving plants. Concrete and ceramic are typically safe but ensure any glaze used is lead-free, especially for older pots. A simple rule: when in doubt, use a thick, food-safe plastic liner as a barrier between the soil and the planter wall. Always prioritize planters marketed as "food-safe" or "food-grade" for your edible garden to enjoy a healthy, non-toxic harvest.
How can I tell if the material of my urban planter boxes is safe for growing food?
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