Posted: 05/02/2016 at 17:06
I have grown it for years Berghill.......never a problem. I regularly divide mine and the shoots are always almost white. Perhaps you had a poor clone. It does benefit from division to keep it compact. And it does not enjoy too much heat in summer so I plant accordingly. I suspect if grown in too hot a situation it will stress....I can see it reverting under those conditions
invasive? It spreads from clumps and at a surface level never deep. Wonder if we are talking about the same plant
I can only add I receive numerous requests for it during the spring. Would not be without it.
It is worth noting that many grasses can become invasive....pennisetums, except the tender (rubrum) type, will spread wide and deep. For this reason I again divide every 2 years