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Why didn't my agapanthus flower this year

I grow two types of agapanthus. The big ones with the great big white and blue flowers had a wonderful summer and flowered prolifically but the smaller variety with the deep blue smaller flowers produced 2 flowers on one bed and none on the other. In past years I have had 20 on each clump. They are grown in raised beds and have been allowed to spread over about 10 years. They have not quite filled the beds so they are not yet too crowded. I watered and fed them and they enjoyed full sun all summer. Do they have a finite life span for flowering or should I just keep my fingers crossed and hope for flowers next year? The leaves were fine and glossy so they were not diseased.

Also do other growers cut their plants to the ground in spring?

Posts

  • purplerallimpurplerallim LincolnshirePosts: 4,243
    Others have said they do get overcrowded and need splitting , but also this year they were affected by the excessive heat. Mine flowered poorly too. Over winter I let mine die back and remove dead leaves in spring, so yes to your question. 😁
  • Hostafan1Hostafan1 Posts: 31,655
    One of the most common causes of poor flowering is becoming dry at the end of the previous summer, after they've flowered.
    Devon.
  • Others have said they do get overcrowded and need splitting , but also this year they were affected by the excessive heat. Mine flowered poorly too. Over winter I let mine die back and remove dead leaves in spring, so yes to your question. 😁

    Thank you
  • Hostafan1Hostafan1 Posts: 31,655
    IMHO excessive heat is only a problem when they dry out. They're native to S. Africa after all. 
    Devon.
  • purplerallimpurplerallim LincolnshirePosts: 4,243
    Yes I agree they are stressed by our climate here, as they are not used to cold wet winters and scorching heat.
  • Hostafan1Hostafan1 Posts: 31,655
    All of mine ( around 80 now, I think ) are in pots and go into the polytunnel to avoid the wet Devon winters.
    I think it's very easy , once they've finished flowering, to be less focused on watering them. I know I've been guilty of it in the past.
    Devon.
  • purplerallimpurplerallim LincolnshirePosts: 4,243
    Mine are in the bulb bed so can't be moved, they were transferred from another bed three years ago and have done well till this year, this has been a trying season.
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