URBAN PLANTER BOXES

Winter's freeze-thaw cycle is a major threat to your urban planter boxes. Water seeps into the material, freezes and expands, causing cracks and damage. To winterize them effectively, follow these key steps. First, ensure excellent drainage. This is the most critical step. Clear drainage holes completely of debris. Elevate pots off the ground using "pot feet" or bricks to prevent water from pooling and freezing underneath. Next, empty or insulate the soil. For non-porous materials like glazed ceramic or metal, removing soil entirely is best. For wood or porous terracotta, you can leave soil in but must add a thick layer of mulch (like straw or leaves) on top to insulate the root zone and moderate temperature swings. Then, protect the planter itself. Wrap vulnerable boxes, especially terracotta, in breathable materials like burlap or horticultural fleece. For added protection, create a barrier by lining the inner walls with bubble wrap or foam board before adding soil. Finally, choose a sheltered location. Move planters to a spot against a building wall, under an eave, or into an unheated garage to shield them from direct wind, rain, and extreme temperature fluctuations. For empty boxes, a thorough clean and dry storage indoors is ideal. By taking these proactive measures, you can shield your investment and ensure your planters are ready to thrive again come spring.