1. Why Are My Azalea Bushes Red

Asked by Anonymous - October 25, 2011

My azalea bushes have turned a ‘reddish’ color in the past few days. I have never seen this happen in the fall any other year. I’m afraid they are diseased. Can you advise me if the bushes are infected? And if so, can they be saved, or must I remove them?


2. Diseases Affecting Azaleas

Asked by yarwood1 - November 19, 2011

We have recently transplanted an azalea from another garden. It now has a sage green coloured fungus which is situated between the forks of the branches. Need to know if this is fatal or whether it can be treated, and if so, how?


3. Blue Spot on Azaleas

Asked by highroller2 - February 14, 2012

Something is causing almost all of the foliage (leaves) to drop off the branches as if my azaleas are dying. I think I can see what I have been told is BLUE SPOT. What can I use to save my azaleas?

  • It sounds like it may be Cercospora Leaf Spot. It causes blue spots in some varieties of azalea (and red in others). The defoliation is unsightly, but will not kill the plant. To treat it, just spray the plant with a fungicide. You may want to repeat the treatment every few weeks until you are sure it is cleared up.

4. My Azaleas Have a Brown to White Color on the Leaves

Asked by mmcave777 - March 14, 2012

Leaves brown and white, looks like mildew, but it’s not affecting the new growth. Also, doesn’t bloom as much as it should.

5. Remove or Treat Sick Azaleas

Asked by turtle2 - March 17, 2012

My azaleas have new growth only at the ends of the stems. The stems, other than at the ends are bare. I had very few flowers this year and the plants look dreadful. How can I get the plants to fill out and become healthy for next year? Are these symptoms of near death experience requiring removal and replacement of the plants? Thanks, Bob

  • I would check the roots. Leaf loss on older parts of the plant are signs of Phytophthora root rot, which is not curable and the plants would need to be removed. But, it could be just run of the mill fungus as well.

    Check the roots. If you see signs of root rot, the plants need to come out. If you do not see signs of root rot, treat with a fungicide and see if that does not clear things up a bit.

6. Azaleas Not Blooming

Asked by Cathy - March 20, 2012

My azaelas have not bloomed in 2 years. Any ideas as to why? I feed them, water them, and nothing. Not sure if they need to be replaced.

  • Are you using fertilizer on your azalea plants? If so, they may be getting too much nitrogen and not enough phosphorus. Nitrogen makes healthy green plants, but too much blocks blooming. Use a fertilizer higher in phosphorus or even a phosphorus only amendment, like bone meal, to get them to bloom. This article will help you: http://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

  • Azalea’s like a low PH soil. and they need a loose type soil. I put my leaves I get from my trees under the azalea bushes for years. They are so big now I need to do a BIG BIG cut back. ALSO THE MOST IMPORTANT thing to do is after and I mean within a week of the flowers dying; trim the bush back. If nothing else just a few inches from the end. The following year your plants should be loaded. Also they make a AZALEA specific fetilyzer that works great. don’t over do it about 1/4 pound for plants up to 4 years old an then add 1/4 pound each year till you get to about a pound per plant once a year. Or follow the suggestions on the fertilyzer package. Good planting and pretty blooms

    Above answer by: zaffutos@hotmail.com

7. Mature Azaleas Did Not Bloom

Asked by billy g - March 24, 2012

The leaves are curled and brown. What should I do, remove plant? Thanks.

  • This condition is typically caused by a lack of water. It is not uncommon to see it in the spring as the plant may not have received enough water over the winter and the dry winter winds further make the problem worse.

    The leaves should regrow on their own now that watering will return to normal. Just as a precaution, I would treat the plant with a fungicide, just in case a fungus is to blame.

    In the future, make sure to give it a good watering in the fall and consider mulching the base to help keep moisture around the roots. Also consider wrapping it in burlap to help keep the winds off it a bit.

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