Mexican orange

Posts

• Bijdezee Posts: 1,484

  May 2020

  The one in the first picture looks very sick. I'm wondering what the white marks are but I think it's done for. I would take it out and don't put it on the compost heap or bin. It looks diseased. 
  
  The second needs all dying or damaged parts removed and maybe a feed with liquid seaweed to help its resistance to whatever going on there. 
  
  I hope someone can help with more spcefic advice on what that disease might be and how to combat it. 
  
  
  
  

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• RussellT Posts: 12

  May 2020

  Might be sclerotinia? https://www.rhs.org.uk/advice/profile?pid=272

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• yurgita Posts: 2

  May 2020

  It’s very dry when I cut it, so don’t think it’s sclerotinia..

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• Borderline Posts: 4,700

  May 2020 edited May 2020

  Choisyas are usually tough plants with very few pests and diseases. They do need water especially if it’s densely planted or right up against walls or fences.
  
  

  Your Choisya shrub has died back and it could be a lack of water, restricted root space resulting in rotted roots which you would not have noticed until the die-back showed above ground. 

  
  

  They are also prone to cold damage causing small die-backs every now and then. I would prune it right back down to base for the bare looking branch and wait to see if new branches form.

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• Poppypuss Posts: 143

  May 2020

  I agree with Borderline that these shrubs can suffer dieback, it looks like the same as one of mine following impact damage. Do you have wild children, dogs or flying balls in the area?😀Other than the dried out branches it looks healthy and flowering well so I’d cut off the dead bits and leave it to recover. 

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