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Advice on potatoe plants

I'm new to growing veg first year so this may be a very obvious question! I need some advice on why a couple of my potato plants have gone yellow and one has yellow dots? Photos attached :) thank you! 

Posts

  • DovefromaboveDovefromabove Central Norfolk UKPosts: 66,265
    They look hungry.
    What sort of compost are they in?
    How deep is it?
    What size are the pots!
    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh







  • josusa47josusa47 Posts: 3,532
    They haven't enough depth of soil for the roots, so the plants are probably hungry and thirsty.  Fill the pots with more of whatever it is they are growing in, water them and give a multi-purpose feed such as seaweed extract.  They should recover.  But potatoes are best grown in the ground if you have any.  If flowers appear, nip them off, because you want the plants to put all their energy into those yummy tubers, not into flowers and seeds.
  • RoyaldeeRoyaldee Posts: 7
    They look hungry.
    What sort of compost are they in?
    How deep is it?
    What size are the pots!
    They are in various pots and grow bags, smallest probably around 12 inch diameter with the grow bags much bigger probably around 20 or 30 inches in diameter. I just had a look and  I have been using a mixture of wetlands general compost it has around 5 weeks feed and a bq brand with supposedly 5 months. Very amateurly I havnt noted which had which! I planted them end of Feb. I have the below fertiliser should I start using it? 
  • RoyaldeeRoyaldee Posts: 7
    I think they have a fungus. Throw them away and start again with fresh compost and possibly new and much bigger pots. They will want a lot more compost than you have in those. Wash your pots well if you don’t want to replace them but I think they are too small for the job anyway. Best of luck
    Thank you! 
  • purplerallimpurplerallim LincolnshirePosts: 3,389
    For two/three seed potatoes you need a full bag of compost at least. Up end the compost bag, give it a good shake and stand it up. Cut across top, that is about how much compost potatoes need to grow in. You can take 30cm of compost out then plant, but you would need to keep that to one side ready to put back in when earthing up after a few inches of growth.
     If your pot isn't big enough to do that, then it's too small @Royaldee
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