Return to the Azalea & Rhododendron Forum | Post a Follow-Up

Rhody flowers turning brown

Posted by gmwinder SoCal (My Page) on
Sat, Mar 6, 10 at 19:01

We just moved into a house last year and all of the rhody flowers turned brown when they bloomed and most of the buds actually fell off before they opened. Our gardener said he 'fed' them but this year the same thing is happening. These are not spots...the flower petals just turn brown. Any ideas what's happening and what I should do please?

Follow-Up Postings:

RE: Rhody flowers turning brown

Here's a link to the problems


RE: Rhody flowers turning brown

  • Posted by morz8 Z8 Wa coast (My Page) on
    Mon, Mar 8, 10 at 19:17

There is more than one reason a rhododendron would exhibit premature flower bud being inadequate watering during drought, often combined with hot dry winds.

Bud blast is a disease that causes buds to discolor and not open, but in this case the buds usually persist unopened on the shrub and are not prematurely dropped as you describe.

Petal blight - Water-soaked spots appear on the flowers which become soft and brownish. "The fungicide Bayleton has provided satisfactory protection when applied to the flower buds as they begin to show color." - American Rhododendron Society. In the case of petal blight, its important to remove infected flowers, avoid overhead watering, and apply good sanitation, keeping any litter beneath the plant picked up....wind, rain, irrigation may spread the fungal disease.

Do any of these symptoms apply to your shrub?

And, beware the gardener/contractor who thinks fertilizer is the first defense for any problem. The only problem fertilizer will address is low fertility :)

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Azalea & Rhododendron Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here