http://www.bluestem.ca/molinia-caerulea.htm

no doubt, one of my favorite short grasses. use it along the front border. i decided to divide it a couple years ago---seems very slow to bounce back.

I've never bothered dividing Purple Moor. It's easy to grow from seed, so I start a couple of dozen new clumps every year.

If you don't want to collect your own seed, Jelitto sells a couple of different varieties.

Here is a link that might be useful: Jelitto