Try superglue under the rim of the pot, laced with broken glass. Most casual thieves wont use gloves and the blood they spill and leave behind, is evidence, which if they are caught, will prove their guilt. One draw back though, you could be sued by the thief! Otherwise the steel cable method is probably best.
Theft of Patio Planters and Containers
How do you prevent patio containers from being stolenJump to latest post
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