If your garden has ever looked “fine” one week and then started twisting, stalling, or producing weirdly bitter harvests the next, it’s easy to blame weather. But a growing number of gardeners are running into problems that don’t wash off and don’t compost away, especially after bringing in “free” inputs like manure, mulch, hay, or bargain soil blends. The tricky part is that the damage can show up slowly, and by the time plants complain, the source is already mixed into beds you’ve worked hard to build. Soil contamination doesn’t always come from some dramatic spill—it often rides in on everyday materials that seem harmless. The good news is you can spot the risk early, test cheaply, and change your habits without tearing out your whole garden.
