Posted: 13/06/2016 at 14:33
Persicaria bistorta in my garden does best in moist soil in sun or dappled shade and spreads slowly over time. I love it. The clump I have in a dryer spot seems more static.
I also have forms with finer spikes of deep red flowers which are also well behaved in full sun. I have the low, ground cover form persicaria affinis which makes a carpet and seems to prefer dry places. Then there are the spotted and V marked variegated forms for shade which I also love. Pesicarias are attractive and versatile plants and not thuggish.
Red Dragon is another good one if you don't suffer from very cold winters. Too cold for white flowered forms too.