As the growing season ends, your urban planter box may reveal a common issue: root-bound plants. When roots circle tightly, forming a dense mat, the plant struggles to absorb water and nutrients. Don't worry; this is a fixable problem. First, gently remove the plant from the planter box. Carefully loosen the outer roots with your fingers or a small tool. For severely bound roots, make several vertical cuts along the sides and bottom of the root ball with a clean knife. This encourages new outward growth. Next, choose whether to repot. You can move the plant to a larger container with fresh, high-quality potting mix. Alternatively, for the same planter box, refresh the soil completely and prune back both the roots and the plant's top growth to balance it. This is also the perfect time to divide suitable perennials, creating new plants for next season. After repotting, water thoroughly and place the plant in a sheltered area to recover before winter. Addressing root-bound plants now ensures they enter dormancy healthier and return with vigor in the spring, maximizing your limited urban gardening space.
How do I deal with root-bound plants in an urban planter box at the end of the season?
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