Answers to Your Questions Vegetables

Answers to Your Questions: Bitter Cucumbers

Question

I’d like to know why cucumbers are so bitter. I’ve noticed a difference in taste depending on the time of harvest.

Photo: Markit

Answer

The bitterness of cucumbers is due to a chemical compound called curcubitacin, naturally present in the plant’s leaves and fruit. In fact, it is the presence of curcubitacin that causes belching after eating cucumbers. However, curcubitacin levels vary according to climatic conditions, and are at their highest when conditions are dry and hot, and the soil is low in organic matter. It therefore goes without saying that, to obtain bitter-free cucumbers, you need to try to keep the soil rich and also cool and moist, especially in hot weather. To this end, vegetable gardeners should learn to use organic mulches (shredded leaves, cocoa husks, forest mulch, etc.), as they often already do in their flower beds. Avoid cedar mulch, however, as it impoverishes the soil.

How to Reduce Bitterness?

If your cucumbers are bitter, remember that curcubitacin is mainly present in the skin and also at the end of the fruit closest to the stem. So, by peeling the cucumber and removing the tip, you can reduce the bitterness a little.

Photo: Africa images

You should also know that it’s curcubitacin that makes cucumbers indigestible for some people. So, if you can’t tolerate cucumbers at all, try growing “burpless” cucumbers (i.e. cucumbers that don’t contain curcubitacin), like ‘Marketmore 80’ (warning: ‘Marketmore 76’, with a similar name, contains cucurbitacin!). And don’t tell me you don’t know where to find them! These days, with the Internet, it’s possible to locate all seeds quickly… and even if the variety isn’t available from a Canadian source, you can import seeds from abroad without the slightest complication.


Larry Hodgson published thousands of articles and 65 books over the course of his career, in both French and English. His son, Mathieu, has made it his mission to make his father’s writings accessible to the public. This article on bitter cucumbers was originally published in Le Soleil on October 21, 2004.

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.

3 comments on “Answers to Your Questions: Bitter Cucumbers

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  2. Well, yes, this is why I do not grow many. The climate here gets warm and arid early, and stays that way late. Here, cucumbers are early spring and autumn vegetables, rather than warm season vegetables. I do like pickling them though, so I keep trying.

  3. Great article! I finally grew a success crop of cukes after trying for many years. Very little bitterness but thanks for the great tips!!

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