Unknown Shrub?

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Posted by r_a_photos 37338 (My Page) on

Mon, Nov 2, 09 at 0:10

Could anyone help me to identify a shrub that has tiny flowers/seedpods that begin as white and pink in late August to September and to a deep pink to almost red by late October. Pictures are posted below. Also, leaves change to yellow in October.

September

October

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RE: Unknown Shrub?

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Posted by esh_ga z7 GA (My Page) on
Mon, Nov 2, 09 at 6:56

Looks like a form of Japanese knotweed, Polygonum cuspidatum. a non-native invasive plant that has been cultivated as an ornamental - especially the pink form..

Here is a link that might be useful: Picture

RE: Unknown Shrub?

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Posted by gardengal48 PNW zone 8 (My Page) on
Tue, Nov 3, 09 at 13:34

Any chance of posting a close-up photo of leaves and seedpods/fruit? It's not a knotweed and I have my suspicions on what it might be but cannot confirm based on these photos.

RE: Unknown Shrub?

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Posted by r_a_photos 37338 (My Page) on
Tue, Nov 3, 09 at 16:59

Here are some close-ups that I have.

RE: Unknown Shrub?

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Posted by laceyvail z5b, WV (My Page) on
Wed, Nov 4, 09 at 6:04

That is Persicaria 'Crimson Beauty', a gorgeous, non invasive relative of the wildly invasive Japanese knotweed. I have had one for 6 or 7 years, and not one seedling or root movement, and this in sandy, light soil. However, mine, in zone 6 begins bloom in early September and the whole show is over by the end of the month. Fully zapped by frost by now.

RE: Unknown Shrub more info

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Posted by laceyvail z5b, WV (My Page) on
Wed, Nov 4, 09 at 6:09

Should have added that it's not a shrub but a perennial.

RE: Unknown Shrub?

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Posted by esh_ga z7 GA (My Page) on
Wed, Nov 4, 09 at 6:11

I don't think the Persicaria genus name is still being used. From what I can tell, it is considered Polygonum cuspidatum 'Crimson Beauty' now. Considered by many to be a clumping form and not invasive.

Here is a link that might be useful: Nursery site

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