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I had a rhododendron die a few weeks ago and I finally think I know what killed it. I thought it got a disease or something. Even the lady att he Extension Office said it was Botryosphaeria. She said to scrape the bark and if it was reddish brown underneath, then it was diseased. I did that and the bark looked normal to me. After digging it up, the roots were black and rotten looking.
Does that sound like root rot to you? If so, is there anything I can do to prevent this from happening to my other rhododendrons that are planted there (a second one has been slowy decling)??? Happily married and mom of 4 Central maryland - Zone 7 |
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Hi you...I did a google search for you & came up with this website. http://www.ext.vt.edu/pubs/plantdiseasefs/450-615/450-615.html
Just copy & paste this in your browser...It looks like it has just the information you need. Good Luck.  ~~~~~~~~~~~~ "I've decided to quit my job, drop out of society, and wear live animals as hats." |
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Most times when we are confronted by suspected root rot, it is in our houseplants. Certain signs show up which makes us unearth the plant to investigate the roots.
Usually if they show blackness...and maybe a little smell of rot being emeitted, we are recommended to clean the roots of any rotted material and give them a treatment of a fungicide such as "Damp Off"...plus new fresh potting soil. I suggest you scan the garden centre shelves and see if there is a fungicide that expressly fights such root rot in yur rhodo. You might also select a new location --fresh soil...but one that compliments its need for acidity for its needs. Mixing into the soil what amendments benefit the rhodo would give it a new home suitable for the acid lover. |
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 ~~~~~~~~~~~~ "I've decided to quit my job, drop out of society, and wear live animals as hats." |
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 The better part of one's life consists of his friendships. - Lincoln |
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 ~~~~~~~~~~~~ "I've decided to quit my job, drop out of society, and wear live animals as hats." |
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How well does the soil where this Rododendron was growing drain? Root rot is most often related to a too wet soil.
The sign of a good gardener is not a green thumb, it is brown knees. |
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Thanks Kimm. I thought about that too. The area is very well drained and I've never had a problem before. There are for rhodos that were planted about 8-9 years ago and they always did fine. However, I do remember the one on the end slowly declining ever since last year. That's the one that died. The leaves curled up totally this year (while in bud) and it died. I took a picture to two local nurseries and BOTH said it looked like root rot.
I was also told that rhodos an azaleas are EXTREMELY sensitive to root rot. I'm not real pleased with the look of them anyway, since they bloom for about 2-3 weeks in early April when no one is out there to enjoy them. I'm thinking about moving them to another spot and replace them with knockout roses. Happily married and mom of 4 Central maryland - Zone 7 |
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