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Azalea Problems

Posted by jclaybou none (My Page) on
Mon, Sep 9, 13 at 9:57

A couple weeks ago I purchased and planted two Encore Azaleas. As you can see from the picture, some of the leaves have dark brown spots with well-defined lines. Additionally, some of the petals and flowers are wilting and dying early.

It has been a hot couple of weeks, and these azaleas are exposed to a pretty large amount of sunlight. Are these problems heat/sun related, or are they the result of a fungus or disease? Any help is much appreciated!

Follow-Up Postings:

RE: Azalea Problems

While I am not terribly familiar with evergreen azaleas, you appear to have two problems. The first - ovulinia petal blight - is effecting the flowers. The second is leaf spotting which is caused by a number of different fungus infections. Both flourish in heat and humidity, but are not directly caused by sun exposure. Unfortunately, there is no real cure once the infections take hold. The leaf spotting is more of an aesthetic problem than life threatening, but of course the petal blight ruins the flower display. There are preventative sprays for the latter. Best to consult your extension service or ag department for recommendations.

RE: Azalea Problems

When plants are transplanted they often shed their flowers in an attempt to survive. If it is petal blight, the flower has spots of tissue that become "water-soaked" and then turn brown. If it is normal wilt caused by transplant stress, it just wilts and turns brown.

These look like fungal leaf spots triggered by the plant getting dry during the transplanting process. Below is a reference for the rhododendron version of what you are seeing.

Your plant looks like it was stressed and got dry during the transplant process. A couple common mistakes in planting are not opening the root ball and not making sure the roots stay moist . An excellent reference on this is Rarefind Nursery's page called how to plant.

Here is a link that might be useful: Rhododendron Leaf Spot

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