The rusty nails she sticks inside flowerpots to chase away the djinn make soil alkaline. Similarly, the wood ash left from the fires she burns to remove a hex contains potassium, which can be nourishing. And as for the eggshells she spreads around in the hope of attracting good fortune, they, too, are an enriching compost. I just wonder how she continues to carry out these old rituals without realizing that they originate from a deep reverence for us trees.