Gardening Pots

Vinegar for Clean Flower Pots

Terra cotta pots heavily stained with calcium. Photo: www.olx.pl

Frustrated by the endless scraping needed to remove stubborn calcium (lime) deposits from flowerpots? There is a much simpler solution: a good soak in vinegar.

Calcium is alkaline, vinegar is acid: they’re essentially chemical opposites. So, if you soak a pot in vinegar, it will simply dissolve the calcium carbonate deposit.

The Method

Plain white vinegar works great on calcium-stained flower pots. Photo: pixabay.com

Just soak your pots in a solution of one part white vinegar to 4 or 5 parts water and one teaspoon of dishwashing liquid for at least 1 hour before cleaning. Then remove the pot from the solution and rub it lightly with a damp cloth. The stain should come off with little effort while the soap will have loosened dirt particles, making their removal simple as well. If the pot is heavily coated in calcium, a 24-hour soaking may be required.

Finally, just rinse the pot with clear water and you’ll have a perfectly clean pot ready for reuse.

Note that anything acid will also do the job, including products like CLR cleaner (a popular calcium and rust remover), but vinegar is cheaper, likely to already be in your kitchen cupboard, environmentally friendly, and won’t irritate your skin.

Article originally published on November 12, 2015. 

Garden writer and blogger, author of 65 gardening books, lecturer and communicator, the Laidback Gardener, Larry Hodgson, passed away in October 2022. Known for his great generosity, his thoroughness and his sense of humor, he reached several generations of amateur and professional gardeners over his 40-year career. Thanks to his son, Mathieu Hodgson, and a team of contributors, laidbackgardener.blog will continue its mission of demystifying gardening and making it more accessible to all.

2 comments on “Vinegar for Clean Flower Pots

  1. It is silly that so many new pots are painted with fake mineral deposits to make them look aged.

  2. What a great tip. I hope I remember it come spring!

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