A cracked urban planter box can usually be repaired rather than replaced, especially if the crack is stable and the structure is still sound. Start by emptying the planter and removing loose soil, plants, and debris. Inspect the crack to see whether it is a surface hairline crack, a structural split, or a failed seam. If the planter is made of concrete or stone, widen the crack slightly with a chisel or screwdriver, brush out dust, and fill it with hydraulic cement, concrete patch, or exterior-grade epoxy. For wood planters, clean out any rot, let the wood dry, then reinforce the crack with galvanized screws or brackets and seal it with exterior wood filler and a waterproof stain or paint. Plastic, resin, and fiberglass planters are often best repaired with a two-part epoxy, plastic welding, or a fiberglass patch kit; roughen the surface first so the repair bonds well. If the crack is along a corner or bottom, add a metal L-bracket or mesh patch for strength. After the repair cures, apply a waterproof sealant inside and out, and check that the drainage holes are clear. Line the inside with landscape fabric or a plastic liner if you want extra protection, but make sure water can still drain. Refill with fresh soil, replant, and water gently. Let the repair cure fully before adding heavy soil or plants. If the crack keeps opening, the planter may be under too much pressure from roots, freezing water, or poor drainage, so fix those issues too.
How do I fix a cracked urban planter box?
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