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Cut Down on Water
Almost all house plants go into hibernation mode over the winter, which means they don't need as much water. And if you keep watering them at summer rates, they could develop rot or diseases. So how to take car for houseplants starts with watering only lightly, and when in doubt check to see if the soil is moist about an inch below the surface. The exceptions to this are citrus species, which tend to do better with higher moisture soil.
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Avoid or Dilute Fertilizer
Similar to water, you don't want to over fertilize your house plants in the winter. And if your plants are healthy, skip fertilizing altogether. If you think they need some fertilizer, dilute it by at least 50 percent before applying, preferably in the fall to care for winter indoor plants.