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do dahlias grow taller each year?

Posted by redpeony z3 (My Page) on
Thu, Aug 23, 07 at 0:11

I am wondering if the size of the tuber affects the height of the plant that grows? Dahlias do not over winter here, and I think my garage is too cold and basement too warm to properly over winter tubers. Costco however does have very good deals if I want to treat dahlias like annuals here. I want to plant them along the back of my flower bed though - so taller is definitely better.

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RE: do dahlias grow taller each year?

  • Posted by jroot 5A Ont. Canada (My Page) on
    Thu, Aug 23, 07 at 9:06

Go for the 4 foot + varieties. In a border, where they need to fight for light, they will very likely shoot up higher.

Do they grow taller each year? I can't really say that is the case. I had some dinner plates that were huge last year, but not so tall this year. Others are much taller this year. I think the preparation of the bed with good nutricious soil makes the most difference.

RE: do dahlias grow taller each year?

Hey jroot and red-

I would like to hear more about this. My 3-4 year old "Babylon Bronze's" have shot to about 7 feet this year and its not for a lack of light as I have full sun in that location and no one is crowded. The new guys, ones I did not pinch back are at a maximum of maybe, at best, 5 feet.

Anyone else care to comment?

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