Delphinium - mildew??

Posts

• Pete.8 Posts: 11,340

  May 2022

  It does look like mildew.
  It's usually caused by the compost drying out then getting soaked which weakens the plant and lets mildew get a hold.
  Try and stop the compost from drying out. Not much you can do though if it rains heavily, but it's the drying out that is usually the start of the problem
  Not sure there's much you can do , but often plants will grow out of it.
  Seaweed extract will help the plant recover if you have any. But don't overdose with it
  
  

  
  Billericay - Essex
  
  Knowledge is knowing that a tomato is a fruit.
  Wisdom is not putting it in a fruit salad.

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• BenCotto Posts: 4,718

  May 2022

  Here’s a recipe from Tom Brown, head gardener at West Dean in Sussex. He says it raises the pH of the leaf surface making it less susceptible to mildew. The advice is to spray weekly.
  

  1 gallon water

  3 tablespoons baking powder

  1 tablespoon vegetable oil

  2 drops washing up liquid

  Rutland, England

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• Fairygirl Posts: 55,117

  May 2022

  I think being in a container will make it harder too.
  They're not really ideal as container plants, unless you're in a wetter part of the country where they're less likely to dry out. Even then, it would be harder if there's a lot of plants in there competing, plus the foliage preventing water getting in to the roots.

  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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• DaveKearley Posts: 130

  May 2022

  Thanks, this is a big container BTW
  
  
  

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• Fairygirl Posts: 55,117

  May 2022

  Ah - fair enough! Probably just getting too dry, then wet,  as @Pete.8 is describing then. 

  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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