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my siberian iris still has no sign of flowers

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Question from stephanie prior

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My siberian iris is 3 years old and flowered well the previous 2 years but this year it still has no sign of flowers (just foliage).
Any idea why this would be please?

  • Views: 752
  • Replies: 2
  • Posted: Tue. 24th May 2011 14:53

Re: my siberian iris still has no sign of flowers

Reply from Kathy C

Hi, Stephanie,
Have they been fed/composted recently? Since yours flowered before, it could be that the soil needs more nutrients. Avoid feeding with a high-nitrogen fertiliser - this promotes leafy growth rather than flowers. Seems a bit early for this but another reason if might not flower is that the clump is overcrowded. You might want to consider dividing when the time is right.
Kathy C.

  • Posted: Wed. 25th May 2011 19:00

Re: Re: my siberian iris still has no sign of flowers

Reply from stephanie prior

Thank you Kathy - I had wondered if it could be one of the things you suggested (although I did sprinke some rose food round the roots in late spring). As I have never created a herbaceous bed before I wasn't sure how often plants needed dividing.
I would be really grateful if you could give me some tips on how and when to divide Siberian iris? I guess there is nothing I can do to promote flowers this year?

I did wonder if the problem might be that I have a striped rush next to it which is growing very strongly and has grown right up to it?

Thank you for your help - any further suggestions would be welcome.
Stephanie

  • Posted: Thu. 26th May 2011 07:41