Why do they say to add rusty nails to soil to increase “acidity”?
There may be confusion due to fact that that some plants are known as “Lime Haters”. Alkalinity in the soil stops these plants from absorbing certain vital elements, like iron, from the soil. They end up looking pale and sad; you could say, anaemic. The usual remedy is to use a product like Sequesterine, which, in solution, contains iron in a form that can remain in alkaline soil yet be able to be taken up by the plant.
