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  • Cucumber Q

    As cucumber is technically a fruit - posting Q here

    Fi mini cucumber plants in unheated greenhouse are growing .. but lower leaves (original ones) are going very blotchy …. Top leaves are fine …. Anything I should be doing.
    (assorted pictures attached)
    Have been spraying with Epsom salt solution in case its magnesium deficiency


    Attached Files

  • #2
    My first thought was cucumber mosaic virus but I don't think its that. I think it's possible damage from frost. Are you keeping them outside in the green house? They really need a minimum of 10 degrees at night for them to be happy. Also, I think I can see water on the leaves? They really don't like that, water from the bottom of the container or stick a pop bottle by the side and water into that.
    Last edited by Scarlet; 18-05-2015, 05:43 PM.

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    • #3
      It's a little early in the season but I am always suspicious of red spider mite on cucumbers. They literally suck the leaves dry. Look underneath the leaves, with a magnifying glass if you have one, are there any tiny reddish spider like creatures or even some webbing?

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      • #4
        It does look like there's water on the leaves,it could be sun damage,the suns been hot. Bottom leaves do get a bit rough looking,how tall is your plant?
        Location : Essex

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        • #5
          Exactly same problem this year ... welcome any other suggestions.

          I know some have said don't get water on the leaves - only water on leaves is when I spray on Epsom salts mix .. can't avoid it then.

          Have examined with magnifying lass - no mites seen.
          Last edited by Argonaut; 22-05-2016, 11:51 AM.

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          • #6
            Cucumber leaves

            Remove yellowing leaves in case of powdery mildew... Then give a nice feed with a sprinkle of Epsom salts...

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            • #7
              If the leaves have been in direct sun it can burn them,water on the leaves in the sun will damage them more than just the sun. Epsom salts doesn't cure it does it? Do you feed them anything like a nitrogen feed for the leaves or a high potassium feed for the cucumbers growth? But it could just be sun damage I don't remove leaves unless they're completely dead,they're not diseased & it wont spread or anything,once the plant grows lots more leaves it will cope with having one or two removed. A tomato plant next to the cucumber could give some partial shading or something else? Have the plants leaves been in direct sun & do you spray them in the morning or in the evening after the suns gone down?
              Location : Essex

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              • #8
                I'll try a feed ..... maybe dried blood
                I have been spraying (only twice) with epsom salts mix in evening.

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                • #9
                  It looks a bit like downy mildew but I don't know,what do the undersides of the leaf look like,is there anything like fungal spores growing under the leaf,under the patches? This link says "Powdery and Downy Mildew often attack the leaves of cucumbers, squash, and other cucurbit family vegetables. White or grayish powdery patches show up on the leaves. The problem is more prevalent when water is on the foliage overnight, and in crowded plantings with poor air circulation.
                  Most cucumber plants will eventually get powdery or downy mildew, especially on lower, older leaves. Plants put less energy into defending leaves from pathogens once they start flowering and fruiting."

                  Growing Cucumbers, How to Grow Cucumbers, Planting Cucumbers
                  Last edited by Jungle Jane; 22-05-2016, 05:39 PM.
                  Location : Essex

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                  • #10
                    A couple of leaves on the bottom of one of my cucs have the same marks. I put it down to water and sun damage.

                    And when your back stops aching,
                    And your hands begin to harden.
                    You will find yourself a partner,
                    In the glory of the garden.

                    Rudyard Kipling.sigpic

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