Agreed! The gardening can be so therapeutic.
All good ideas, and there are currently similar plants available for sale under the Fallopia Japonica species (such as Mexican Bamboo, Fleeceflower, Crimson Beauty, and compact varieties). However, the knotweed plant is not specifically offered by any nursery listed in the first 5 pages of searching. Most results for Knotweed just indicate how to control/remove it.
So at this point, it may be worth contacting Buhner to see if the sister varieties would share any of the medicinal benefits found in the Knotweed version of Fallopia Japonica.
Until then, I will enjoy tending to my new Sida Acuta seedlings.
Now, in your opinion, was the home-grown/wild harvested crop worth the effort (as far as the net yield from each plant)? or was the process of gardening more fulfilling in and of itself?