"Andrew" wrote in message
...
I am looking for a cheap form of japanese knotweed; for the
resveratrol

content, which is supposed to slow aging. Anyone growing this for
food

purpose's, any advice would be appreciated.

Not really recomended to grow as below taken from Wiki:

It can be found in 39 of the 50 United States (PUSDA) and in six provinces
in Canada. The species is also common in Europe. In the U.K. it was made
illegal to spread Japanese knotweed by the Wildlife and Countryside Act
1981, and it is listed by the World Conservation Union as one of the world's
100 worst invasive species.[4] In the U.S.A. it is listed as an invasive
weed in Ohio, Vermont, Virginia, New York, Alaska, Pennsylvania and
Washington state