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Any idea what's wrong with our tomatoes?

MigwireMigwire Posts: 12
in Problem solving
We have a few sweet aperitif tomato plants in the greenhouse, but the past week I've noticed leaves curling and turning brown. They have green depressions in them then turn brown and curl up. No sign of insects.
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  • MigwireMigwire Posts: 12
    No, we have an irrigation system on a timer. They were soaking with condensation last week when it was grey and damp however. 
  • DovefromaboveDovefromabove Posts: 88,147
    edited July 2020
    That’ll be the problem ... you need to improve ventilation considerably  ... condensation provides the perfect conditions for fungal infections, of which blight is one. 
    Tomatoes need dry leaves. 
    Also they need watering according to the conditions rather than the clock ☹️ 



    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • MigwireMigwire Posts: 12
    Dovefromabove said:
    That’ll be the problem ... you need to improve ventilation considerably  ... condensation provides the perfect conditions for fungal infections, of which blight is one. 
    Tomatoes need dry leaves. 
    Do you think that's blight? 

    It's a polycarbonate greenhouse, I've often thought about fitting some vents to the corners opposite the door. None of the others are affected, it's two of these sweet appertif ones 
  • DovefromaboveDovefromabove Posts: 88,147
    edited July 2020
    No i don’t think it’s blight ... or at least it doesn’t look like the blight we’ve had in the past which appears as grey blotches on the leaves and then black patches on the stems and then eventually sunken greyish patches on the fruit. 

    I think yours have one of the others less dramatic/problematic fungal problems of which there are a few ... I would remove the worst affected leaves and improve the conditions. Increase ventilation and cut down on watering ... I only water mine when the top inch of the compost is dry. 
    Good luck 🤞 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • FairygirlFairygirl Posts: 55,117
    Mine are in a polycarbonate greenhouse. They were watered yesterday for the first time in about a week because it hasn't been warm enough in there for them to dry out enough to need it.
    I still have the lid open slightly despite single fig temps overnight.
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
  • NollieNollie Posts: 7,529
    It was so sodden and humid here in June I lost my entire outdoor tomato crop, the leaves never dried out, they got one of the many fungal infections and the early fruit that set just rotted on the plant ☹️  Not necessarily the exact same problem as you, but just an example of what Dove is saying really, they hate being damp!
    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
  • DovefromaboveDovefromabove Posts: 88,147
    I’m just wondering whether removing a few leaves on all the plants might improve air circulation making it less stagnant.

    What do you others think @Fairygirl and @Nollie ?

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • NollieNollie Posts: 7,529
    Worth a try, plus of course removing those infected ones, spacing the plants out more if there is room and lots of ventilation. I always remove the bottom 30cm of leaves anyway when planting out. At least in a poly you can control the environment a bit more.
    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
  • DovefromaboveDovefromabove Posts: 88,147
    Very true @Nollie ... I grow mine outside nowadays ... they’re learning to swim today 🙄 🍅 🦆 
    As soon as it stops raining and we get some sunshine I’ll shuffle my pots around to get more space and airflow between them so they can dry out a bit 🙄 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • FairygirlFairygirl Posts: 55,117
    I regularly remove lower ones as the greenhouse is small. 
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
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