GROUNDCOVER: HOUTTUYNIA

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Would anyone know of a source for the groundcover HOUTUYNIA 'Heart of Gold'?  It may be of British origin. 

 

It has much more of the yellow color than the common form which is sometimes called the Chameleon Plant.  This plant is very invasive but I'd like to use it in a container as the leaf is quite attractive with a large yellow area centered by a small green spot, with a touch of pink.

 

Thanks for any assistance in locating this plant.

 

Betty

WNY Zone 5

b*@buffnet.net