Why Your Grandfather Was Right to Hammer Rusty Nails Around His Hydrangeas (Sort Of)
For years, hammering rusty nails into the soil around hydrangeas seemed like eccentric garden superstition. But digging into the science reveals a more nuanced truth: grandfather’s method was based on real botanical principles, even if the execution was imperfect. The real story is about inherited knowledge, close observation, and why some old remedies contain a kernel of truth.