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Posted by loodigg (U14814581) on Sunday, 10th April 2011
My toms are in an unheated conservatory growing on in pots. Its been very warm by day lately (25*c) and I cover them at night but its not dropped below 10*c. Just noticed that some of the leaves are getting marks on them..bit like blisters, and like bubbles. Other than that they seem ok and kept moist. Should I worry? is it the big change in Temps? Not seen these marks before. They are alongside many Peppers and Chillies which are not affected.
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Blisters or bubbles? What colour? The only thing that occurs to me is something fungal. Is there any air circulation in the conservatory? Warmth and moisture and still air are ideal conditions for fungal problems.
The 'blisters' turn white after a few days, then the edge of the leaves shrivel up. UPDATE :- also growing on are two other toms, Alicante and Italian Plums but they are fine its only the Gardeners Delight which have the problem. Any other Ideas??
The shrivelling edges sounds like over-watering. You said earlier that the soil's moist. It shouldn't be constantly moist. Ease off the water for a bit and see what happens.
It might still be fungal but the fact that the others are all right counts against it. Of course, if the others start showing the same signs, it's probably the answer. Maybe isolate the GDs just in case.
It is possibly too hot and dry in the conservatory for the young foliage. I would increase the ventilation if it is a hot day.
Could it be sun damage? If the damage is greater on the side closest to the window, that could be the problem. Try moving them away from the window in hot sunshine. I've had this happen and the plants soon recovered.
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