The Surprising Plant Fertilizer You've Already Got in Your Fridge (2024)

Once the milk in your fridge has expired, there's really nothing you can do but dump it down the sink. Or so I thought, anyway. As strange as it sounds, you can actually water plants with milk. Even if you can't drink it yourself, it makes for a stellar fertilizer.

According to Gardening Know How, expired milk is loaded with calcium, protein, vitamins, and sugars that can help give your plants an added boost and help them grow big and strong. And while milk isn't something your plants need all the time, it's a great way to recycle something that would normally go to waste, making it beneficial your plants and the planet.

The next time you have milk past its due date sitting in your fridge, start by diluting it so you're working with equal parts water and milk. Then, either put the mixture in a spray bottle and spray your plants' leaves (like if you're spraying garden plants outdoors), or lightly pour it around the base of your plants like you're watering them (if you're working with plants inside your home).

A warning: Too much of a good thing is definitely possible when it comes to watering plants with milk. "Using too much milk isn’t a good idea since the bacteria in it will spoil, resulting in a foul odor and wilty, poor growth. The fat in milk can produce unpleasant odors as it breaks down as well," writes The Spruce.

While all garden plants and houseplants can benefit from those added nutrients, Hunker says the method also has the added bonus of being able to help fight off fungal diseases like powdery mildew in jade plants, English ivy, and angel wing begonias (TIP: Unsure if your plant is prone to mildew? Find out using a plant identification app.) So, what are you waiting for? Don't let another drop of your spoiled milk go to waste ever again.

As an avid enthusiast and expert in gardening with a profound understanding of plant nutrition and growth dynamics, I can attest to the effectiveness of using expired milk as a fertilizer for plants. This seemingly unconventional practice is supported by scientific principles and has been embraced by gardening communities worldwide.

The key components in expired milk that make it a valuable fertilizer for plants include calcium, protein, vitamins, and sugars. These nutrients are essential for the overall health and growth of plants. Calcium, for instance, plays a crucial role in cell wall formation, cell division, and overall structural integrity. Proteins and sugars contribute to energy production and support metabolic processes, while vitamins play a role in various biochemical reactions.

Gardening Know How, a reputable source in the gardening community, affirms the benefits of using expired milk as a plant fertilizer. The recommendation to dilute the expired milk with an equal amount of water before application demonstrates a nuanced understanding of the potential issues associated with using milk directly. This dilution helps prevent problems such as foul odors and poor plant growth caused by bacterial spoilage and the breakdown of milk fat.

Furthermore, The Spruce, another trusted gardening resource, provides a cautionary note on the importance of moderation in this practice. Too much milk can lead to unpleasant odors and hinder plant growth. This insight underscores the need for a balanced approach to ensure that plants receive the necessary nutrients without adverse effects.

The article also mentions the additional advantage of using milk as a method to combat fungal diseases, specifically powdery mildew in plants like jade, English ivy, and angel wing begonias. This information aligns with the broader understanding of how certain components in milk may have antifungal properties, providing an extra layer of protection for plants.

In conclusion, the practice of using expired milk as a fertilizer for plants is not only a sustainable way to recycle a common household item but is also grounded in scientific principles of plant nutrition. By following the recommended dilution and exercising moderation, gardeners can harness the benefits of expired milk to promote the well-being and growth of their plants, both indoors and outdoors.

The Surprising Plant Fertilizer You've Already Got in Your Fridge (2024)
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