Young cucumbers turning yellow

10 years ago

last modified: 10 years ago

anyone know why my little cucumbers are turning yellow? The seeds are hybrids so it cant be because of pollen. The cucumbers are in a shade house.

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Comments (2)

tropicbreezent
10 years ago
Don't know where you are but since you're a commercial grower you should contact your local Agricultural Department office as they'd probably give you the best advice. It's probably a mineral deficiency so a soil test would help and a list of which fertilisers you have used.
Yao Lin (bay area, USDA zone 9b)
10 years ago
last modified: 10 years ago
I can see from the pictures that there are healthy cucumbers on the same plant. I have the same issue in my garden. In nearly every plant I have, I have 1 healthy cucumber which is already 4"-6" long. But each plant also has 1-3 cucumbers which turn yellow after reaching 1"-2.5". My plants are mostly smaller (8"-25" tall) at this stage.

Some people say it may be due to over watering. I do water them everyday. But we have no rain here and I estimate each plant gets around 300ml of water each day. The surface soil is completely dry when I water. In a few occasions, I check the soil at 1" depth. It has some moist but it's nowhere close to be water logged. Besides, if it's due to over watering, shouldn't it affect all the cucumbers on the same plant?

As with the pictures above, I don't see any issues with my cucumber leafs.

Appreciate if you could update me on your findings.
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I think this looks like Nitrogen deficiency in the soil. You need to add a Nitrogen fertilizer for dark green leaves. I use a Nitrogen fertilizer till the plants are big enough and have dark green leaves. After that you can switch to a low Nitrogen fertilizer.
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Agree. leaf miners. They don't pose any real threat to the plants. As mentioned just remove the leaves and/or squish the worm. As for the yellow bottom leaves, that is usually from over-watering, a common problem when using containers as you are. Since nutrients leach out of the pot every time you water you need to replace them regularly and make sure your water pattern is one of consistency - not too much and not too little. Plus there is clearly lots more room in your pot for more soil. The more soil in the container the easier it is to stabilize the watering. Lots of info about all this over on the Container Gardening forum here. Dave
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Where in the world are you? What is the soil these are planted in like? Soil pH, nutrient levels, amount of organic matter, drainage, soil life? What has the weather been like? Cooler than average? Warmer than average? What has the pollinator activity been like? kimmq is kimmsr
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I'm in Toronto. I had similar issues with my zucchini (and now starting to with my cucumbers). I tried milk solution. I tried baking soda solution. I think that I was too late with the PM control. My Zucks stopped producing viable fruit. They would still produce female flowers but the fruit would just turn yellow, mushy and die off. So I decided to rip them out, and use the space for fall planting (some beans, peas, radishes). Lesson learned for next year: start spraying the squash leaves at the first sign of PM. There are several recipes you can find online using milk, baking soda, etc. Some people just spray the leaves down with water in the early morning and that removes the mildew. I did not try that myself.
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Young cucumbers turning yellow

Comments (2)

tropicbreezent

Yao Lin (bay area, USDA zone 9b)

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