Houseplant leaves can be effectively cleaned using a very diluted solution of white vinegar or lemon juice, according to a report published today. This method can remove dust and chalky mineral spots left by hard water, which can otherwise slow photosynthesis and dull the plant's appearance.
While the acids in these common household items are capable of dissolving mineral salts, the report cautions against a popular online recommendation for a one-to-one mix of acid and water. This concentration is considered too strong and risks scorching the plant's leaves.
Instead, a much weaker solution is advised: approximately one teaspoon of white vinegar or two tablespoons of lemon juice per litre of water. This diluted mixture can be applied gently to the leaves with a microfibre cloth to lift marks cleanly.