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Dahlia Experts- Please help-

Posted by longfellowmpls Twin Cities (My Page) on
Sun, Aug 19, 07 at 17:12

I consider myself a competent gardener- with about 20 years of experience. I have grown dahlias for a long time now and am really discouraged by this year. I lost about half my plants to what I believe is a virus- they were either stunted to begin with and died- or shriveled up and turned yellow- after getting off to a strong start.

For the last 4 seasons I have grown dahlias in full sun each with adequate water and I believe adequate nutrients (bone meal added at planting and reg fertilizer there after)- on the south side of the house in raised beds (about 8 inches high). I've grown them in this same location now for the last 4 seasons- each season has brought more fatalities to my plantings- with this year being the worst! Here are my questions:
-Do I need to rotate planting them (maybe plant in this area every other year?)
-Is it the stock I got to begin with- which then affected other plantings? (Some of the tuberes were bought from a specialty grower in OR- those are the ones that had a 100% failure)
-Did the drought this summer- with its intense heat- weaken everything to the point of it getting sick? ..and maybe this was just a bad year for dahlias?
-Do I need to truck in some horse manure to amend this location's soil-is it a Nitrogen issue/deficiency?
Please help!
Thank you!

Follow-Up Postings:

RE: Dahlia Experts- Please help-

Sorry to hear about your losses. You might want to ask the folks on the Dahlia forum what might be causing this as well.

Here is a link that might be useful: Dahlia forum

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