Woodlanders.net An excellent nursery in Aiken, SC.

And depending on how z7 you are (I am), pink muhly is an annual for me (never got it to overwinter). Just throwing you some caution unless you have been successful with it already.

I also recommend Santa Rosa as good and usually pretty cheap, they have sales all the time.

My efforts with muhly grass persuaded me that our seasons too short to develop the pink cloud that is its feature. I was willing to overwinter inside but couldn’t overcome the other factor. Good luck though.

Kitasei has a good point too. I had that experience as well, just as it's getting going, a frost will arrive and BLAM, dead.

It's not quite the same, but may I mention Muhlenbergia riverchonii as an alternative, it's much hardier (overwintering for a couple of years in an unprotected pot even).

It's easy to grow from seed and grows quite rapidly once it gets up and running. There are tons of seed sellers (of anything) on Ebay.

If it turns out that pink muhly grass isn’t hardy for you, check out Eragrostis spectabilis, purple love grass.

Sant Rosa Gardens haS an earlier blooming variety of PMG.