I am also a huge fan. I have had it for at least 8 years, and have never "divided" it. I have taken small clumps of it to plant in other places around the yard, but I don't think of that as dividing. It does get quite ratty looking in early spring. I just go over it with a wire rake to get out the worst of the dead leaves. By mid May the new growth has filled in and the blooming has begun.

This year is going to be different...we have had a strange spring. Very early warm temps in March had the new growth on it well advanced when we got a night of below 20 degrees. All the new growth was killed and since then the temperatures have varied wildly day to day. The Dimity and everything else is having a hard time with this erratic weather.

For those unfamiliar with what you and I so love, here is a picture. This Persicaria is hard to find, but is worth looking for.

{{gwi:230172}}

A bit OT but another hard to find but interesting looking Persicaria is Purple Fantasy.

Last July I bought a 1/2 gallon pot that was blooming gloriously, and planted it in the ground. This spring, it emerged healthy and all summer has grown and spread into a neat, healthy ground cover. It's in a fairly sunny spot. However, it didn't flower at all! So disappointing. Any idea why that happened?