Author Topic: Help! Blossom End Rot on my yellow squash  (Read 4896 times)


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  • Posts: 4
  • Kingston, OK Zone 7b
Help! Blossom End Rot on my yellow squash
« on: May 26, 2023, 02:50:33 pm »
I had what looked to be a nice crop of squash and today I noticed several with blossom end rot. What do I do to stop it?


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  • Posts: 30
  • NE Texas Zone 8a
Re: Help! Blossom End Rot on my yellow squash
« Reply #1 on: May 27, 2023, 03:52:51 pm »
Since nobody else is jumping in, I'll try to offer what little knowledge I have.  Your problem could be caused by inadequate calcium uptake or lack of pollination.  For the calcium problem, put a teaspoon of calcium nitrate down the watering tube once a week or every ten days.  For the pollination problem, you will need to pollinate the female flowers by using a Q-tip or small, soft paintbrush.  Gather the pollen from inside the male flowers (which sit on a narrow, straight stem) and gently transfer it into the female flowers (which have what looks like the beginning of a squash behind the flower). Early morning when the blooms are fully open is the best time to do this.

I'm not sure if there are any other reasons for your problem, but those are the only ones I know.  Good luck!