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dormant rhododendrum

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by Peggy L on October 07, 2006 09:29 PM
I planted two Rhododendrum plants a couple of years ago and they have never flowered. I'm not sure why they are'nt flowering. My Azaleas are doing just fine. I live in upstate NY.
thanks for any help that you can provide..
by afgreyparrot on October 07, 2006 10:08 PM
Here's some info that might help you...


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by RugbyHukr on October 07, 2006 11:47 PM
if it is budding but not flowering, it may be that the buds begint to open when it gets warm & then it gets frrezing cold again & kills the buds.

if it is not budding, it may be soil pH or nutrients. do not fertilize with nitrogen rich fertilizer. this will promote foliage & supress flowers. use a high phosphorus fert.

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by joclyn on October 08, 2006 11:19 AM
what kind of sunlight are they getting? they need part shade.
by Peggy L on October 08, 2006 09:33 PM
they get sun in the morning and shaded in the afternoon
by obywan59 on October 10, 2006 09:38 AM
That sounds like a good spot then. Have you tried fertilizing? A couple of years ago, I started fertilizing my rodies both spring and fall with Holly-Tone with tremendous results. My plants are literally covered with blooms and they are so healthy that I don't even have to pick off the spent blossoms any more. Without removing spent blooms, rhododendrons can turn into alternate year bloomers.

Also, plants sometimes need a few years to make good root growth before flowering. Fertilizing will hurry this along.

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by joclyn on October 10, 2006 11:00 AM
yes, those sun/shade conditions sound ideal.

i agree with terry - it can take a couple of years for them to become well enough established to start blooming.

some good fertilizer never hurts!
by digital flower on November 02, 2006 08:08 AM
You have got some good advice so far. Whenever people tell me their rhodos are not blooming the amount of light is the first thing I think of.

Since you live in Upstate NY I am going to assume a harsh winter [Wink] It could be that you have a cultivar or species that is not bud hardy. Check the hardiness rating of the types you used.

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by chermoni on November 17, 2006 10:44 AM
I don't know much about rhodies, but I do know that they prefer a more acidic soil. This is probably why there are so many of them out here, tons of fir trees. I've heard you can use coffee grounds as a mulch to increase the acidity, but I've never tried it. Hope any of this helps.

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