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Use Vinegar To Fertilize Acid-Loving Plants

This is probably one of our favorite tips on this list. You can actually use vinegar to fertilize your plants, which is especially helpful for potted plants. Mix a tablespoon of vinegar for every liter of water, and then use that solution to water your plants. Repeat the process for 15 days to give your plants a bit of a boost. Just make sure to double the type of soil your plants need to grow.

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Luckily, there are a lot of plants like this, including azaleas, blueberries, and rhododendrons. You're going to want to look at plants that need a PH level of 6.5 or lower.