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Help what's happened to my tomatoes?


Having some issues with my tomatoes. It's the first time I've grown them from seed. All was looking good until they started getting light yellow patches on the leaves and drying up on the lower leaves at the ends and moving inward. It's now on some of the stems too. Could it be as simple as a watering issue? They're all in multipurpose compost in pots. They were a bit wet and I dried them out by putting them in the sun but can't tell if it's helped or not. Can any tomato wizards offer some advice please? 


  • Pete.8Pete.8 Posts: 11,126
    Were they somewhere quite sheltered then you put them out in the full sun?
    It may just be sunburn.
    Have you fed them with anything?
    They yellowing may indicate a deficiency, or it may be a result of the shock of a lot of sunshine.
    Generally tomatoes do not need fertilizer until the fruits begin to set. The fresh compost you use when you pot them up is enough to keep them growing.
    I use seaweed extract on just about everything every couple of weeks from the seedling stage onward as it's not strong but has all the micro-nutrients that plants need.
    But it may just be due to some sun scorch.

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • FairygirlFairygirl Posts: 54,350
    It's not really a problem. Lack of good airflow can  cause it, and if you're overwatering then sticking them in the sun, it can also be a bit of stress. Fluctuating temperatures aren't good for them so try and keep a more even temperature for them.
    Try not to make them too wet. It's actually better for them to be slightly on the dry side before watering again.
    If you water them from overhead, and get it on the foliage, that also causes some damage.
    However- they also lose some lower leaves anyway, as they grow  :)
    It's a place where beautiful isn't enough of a word....

    I live in west central Scotland - not where that photo is...
  • EdwcQWGlccEdwcQWGlcc Posts: 2
    Thanks that's really helpful  :)

    They leaves started to turn on some that I had on a very sunny window ledge and the soil was saturated so I moved them into the sun. They're also all quite close together so the lack of airflow also makes sense. Maybe I'll let them dry out and move them apart somewhere not in full sun and see how it goes? Maybe they're suffering from the change in environment too. 
  • KiliKili Posts: 1,116
    pinch out the side shoots while your at it

    'The power of accurate observation .... is commonly called cynicism by those that have not got it.

    George Bernard Shaw'

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