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Lupin turning yellow

freddiebrownfreddiebrown Posts: 5
edited April 2019 in Problem solving
Hi my Lupin's were great last year and this year started off well but have now turned yellow and growth has slowed. Can anyone tell me why? Others in the same bed are nice and green growing on.

Thank you







Posts

  • LynLyn Posts: 23,190
    Could be slug pellets poisoning, 4 or 5 grains around them will be plenty, they just attract every slug in your garden, 
    Gardening on the wild, windy west side of Dartmoor. 

  • freddiebrownfreddiebrown Posts: 5
    Thanks Lyn, Do slug pellets poison the soil? I have only put these pellets down today to try and stop anymore slugs.
  • LynLyn Posts: 23,190
    You won’t distract the slugs with those, they come from every corner of your garden, but not only will they kill slugs they could kill hedgehogs, voles and birds. 

    If you shovel them all up and and put down  a few placed around the plant it will be better for the environment.  Quicker these things are banned the better. 
    Whats your soil like, mine thrive in acidic type maybe yours is too alkaline. 
    Gardening on the wild, windy west side of Dartmoor. 

  • freddiebrownfreddiebrown Posts: 5
    "Others in the same bed are nice and green growing on"
  • guttiesgutties Posts: 224
    @Lyn, I'm interested in what other precautions we can take against slugs.  If no pellets are to be used then would that mean that plants such as lupins and delphiniums would be no more on display in our gardens?

    I sowed some zinnia seed a few weeks ago.  Last week I potted on some of the stronger seedlings and placed them in a cold frame.  The next day about half of them had been destroyed (presumably by a slug).

    I don't have a view on this; but rather wondering what the alternative is.
  • SlumSlum Posts: 385
    I have lupins and delphiniums in the garden and find they don’t need protecting from snails and slugs. As long as they’re healthy and strongly growing plants they’ll be fine. Slugs and snails tend to prey on the weaklings.

    As for one plant turning yellow, it is often caused by moisture stress. Either too much or too little moisture. How long have they been in the ground? Did you compost at the bottom of the planting hole? That can create a sump meaning the plant is sat in its own puddle. 
  • freddiebrownfreddiebrown Posts: 5
    Thanks @Slum, they went in last year with grit and compost, it must just be heavier soil on that part of my border. I will leave them alone for a while and see what happens. Just strange as another is 30cm away which looks healthy and huge in comparison. I do have lots of Alliums planted in and around them this year, could that be an issue?  

    Thanks
  • SlumSlum Posts: 385
    When you say 'went in with grit and compost', did you dig it into the general area or was it placed directly under the rootball?

    I can't imagine the Alliums would be consuming enough moisture to give drought conditions to a lupin.
  • freddiebrownfreddiebrown Posts: 5
    No I think I may have watered too hard and drainage isn't great. I dug a hole twice the depth of the pot then put grit followed by compost and mixed well together. 
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