18.  Water Your Plants With Aspirin

Here’s another incredibly affordable and simple gardening tip utilizing a common household item that everyone has: Aspirin. Surprisingly, you can make a solution by dissolving one aspirin tablet in four liters of water. Then, pour this solution into a spray bottle and apply it directly onto your plants. The aspirin acts as a natural repellent against pests and also helps prevent plant diseases and rot. It’s quite likely that you were unaware of this useful application of aspirin, right?