Winterizing your urban planter boxes is crucial to protect your plants and the containers themselves from freezing temperatures. Here’s a simple, effective guide. First, assess your plants. Tender perennials or shrubs may need to be moved indoors to a garage or shed. For hardy plants staying put, begin by giving them a deep watering before the first hard freeze; moist soil retains heat better than dry soil. Next, insulate the roots. Wrap the planter box with materials like bubble wrap, burlap, or horticultural fleece. For severe cold, create a "box within a box" using straw or leaves between the inner pot and an outer crate. Mulch the soil surface with a thick layer of straw, leaves, or wood chips to regulate temperature. Elevate planters off cold surfaces with pot feet or bricks to improve drainage and prevent frost lock. For empty boxes, clean them thoroughly to remove debris and disease, then store them upside down in a sheltered spot. Finally, pause fertilizing and prune only dead material. Come spring, your prepared planter boxes and dormant plants will be ready to thrive again.
How do I winterize my urban planter boxes to protect them from the cold?
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