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Screenshot: Beth Skwarecki To hear TikTok tell it, banana peels are an amazing fertilizer for your garden due to their high potassium content and the fact that you get them basically for free (assuming that you eat bananas). The reality is a lot less exciting. Nonsensical gardening tips have always been passed around, sometimes by literal word of mouth, books, newsletters, or Facebook comments. TikTok is just particularly good at the job because you can provide convincing footage while almost completely eliminating any context, source material, or opportunity for discussion. So, let’s dig in. How can you use banana peels in your garden? The usual recommendation is to steep banana peels in water, and use the resulting liquid to water your vegetables or flowers. There are also variations that have you dehydrate the banana peels and grind them up, or chop them into pieces and bury them in your garden soil. Supposedly the peels are high in potassium, which is one of the nutrients plants need to grow—if you buy packaged fertilizers, you’ll notice that they have three numbers on the front indicating their percentage of nitrogen, phosphorus, and potassium (known as NPK, after those elements’ chemical abbreviations). For example, a 1-1-1 fertilizer contains all three in equal proportions. Are banana peels really high in potassium? Bananas have a reputation for being high in potassium when we’re talking about nutrition. But if you look up the actual numbers , you’ll find that a potato has more potassium than a […]