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Photo: jax10289 (Shutterstock) When deciding what type of container is best for growing your plants, you’ve probably at least considered traditional unglazed terracotta pots. They’ve long been a staple of at-home gardening, and for good reason: They’re relatively inexpensive, can be reused, and are porous, allowing for an exchange of air and water. But they also have a tendency to develop white stains on the outsides of the pot. And while some people consider that part of their rustic charm, others find the film unsightly and want to get rid of it. Either way, here are a few ways to remove the white residue from the insides and outsides of terracotta pots. What is the white residue on the outside of terracotta pots? The white film or crust that forms on the outside (or inside) of clay terracotta pots is soluble salts. Hard water (which includes most tap water) contains salts and minerals. When you use it to water your plants and it eventually evaporates, it leaves behind these salts and minerals as a white residue—kind of like what happens on shower heads. Meanwhile, if you have softened tap water, you can still see that white stuff on the outside of your terracotta pots. But in this case, it’s likely caused by your soil fertilizer, which contains minerals. Because these clay pots are porous, the minerals from the soil seep through the pot and can appear as residue. How to clean the white reside from terracotta pots If you […]