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Is this blight?

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  • Is this blight?

    I've been growing tomatoes outdoors for several years but this is the first year I have noticed this. These brown marks appear on about a third of my tomatoes. I'm wondering if this is the dreaded blight?

    https://i.pinimg.com/originals/b0/8b...2b84c26ffb.jpg

    https://i.pinimg.com/originals/f8/99...e71a6545c0.jpg

  • #2
    It's not blight, but I don't know what it is, just one of those weird and wonderful things nature throws at us gardeners. Your tomato plants otherwise look pretty healthy to me.
    Last edited by peanut; 24-08-2020, 04:18 PM.
    Always aim for the best result possible not the best possible result

    Forever indebted to Potstubsdustbins

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    • #3
      Have you been fertilising them,I did mine today. Potassium helps plant cells & health maybe they’re lacking in nutrients causing this? It’s been windy it might be damage? If it’s blight the whole tomato should go brown looking quite quickly. I’ve had brown marks on tomatoes before a bit like that but it wasn’t blight it was just blemishes. Look for brown markings on the stem,I usually see it affect the stem before the tomato,haven’t seen it this year yet. You could remove some of the lower leaves under the lowest truss,to help air circulate.

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      • #4
        Thanks both. Maybe the wet weather in June is responsible...I give my plants a liquid tomato feed once a week so I don't think they are lacking potassium. It's a relief to know it's not blight!

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        • #5
          It's not blight, although the purpling of the leaves is magnesium deficiency.

          As for the fruit, the brown marks in the second picture look like slug damage, caused by a tiny slug lightly grazing the fruit and then the exposed flessh oxidising. The mark in the first picture is a bit different, and I've no idea what that is.

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          • #6
            Originally posted by ameno View Post
            It's not blight, although the purpling of the leaves is magnesium deficiency.
            Interesting. I did a quick google and magnesium deficiency causes yellow leaves, phosphorous deficiency causes purple leaves. Apparently this causes slow growth as well. I have always felt my plants grow very slowly. Something to bear in mind for the future...
            I absolutely love the learning process associated with gardening!

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            • #7
              Cold also makes the plants go purple and stunts long term growth. Don't plant them out too early.

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