Save Cooking Water for Your House Plants

Save Cooking Water for Your House Plants
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I am typically not good at caring for house plants. I currently have three indoor plants, all of which are “alive,” but they are not exactly thriving. Perhaps it’s the low light levels in the Pacific Northwest (I hear there are lamps for this), or my sporadic watering schedule. Or perhaps my plants are not getting the nutrients they need to live their best life on my windowsill.

Why cooking water is great for plants

According to Kara Nesvig at The Kitchn, who originally found this tip at East River Nursery, a little cooking water may be just the thing my leafy children need. The cooled, leftover blanching or boiling liquid contains nutrients that leach out of your food during the cooking process, and depending on what you’re having for dinner, you could end up supplying your plants with some much-appreciated phosphorus, nitrogen, and calcium:

When you boil your food such as pasta, vegetables, eggs, or potatoes, many of the micronutrients such as phosphorus, nitrogen, and calcium are boiled off into the water. Therefore, after you have let the water cool down, not only will you provide your plants with a nice drink, the plants also get a bit of much needed fertiliser from the nutrients within the water.

Even if you are not extracting plant-food levels of nitrogen from whatever it was you made for dinner, every little bit helps, and repurposing cooking water this way cuts down on water waste while saving you a little bit of money. (Depending on how many plants you have, this could be a medium amount of money.)

Just make sure to completely cool your water before dousing your plants with it, of course. You’ve probably seen what boiling water can do to spinach, so just imagine what it would do to your begonia.

Comments

  • Wife ALWAYS uses water from washing rice before cooking to water the houseplants. The fact that she has to wash the rice 6 times and after each wash rinse the water out on the potted houseplants, moving between the sink and the next houseplant 6 -DID I SAY SIX – times, spilling water as she goes, using more time than is needed and having a holier-than-thou pout as she does it doesn’t bother me in the slightest.

  • Plants will tolerate salt water on their leaves but in the soil it will dehydrate them. This is a terrible idea. If the water from your pasta cooking isn’t salty, you’re not doing it right.

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