When we plant Muhlenbergia capillaris down in Houston for restoration/ecological/habitat projects they will absolutely do well without supplemental water; it just depends on the soil profile you are putting them in and the moisture content. Here they are classified as a Facultative Wetland species, which pretty much means that they can deal with a little dryness, but prefer mesic/moist soils. If you have an area with a slight depression, they could work there. With all transplants it is important to hand-water until they establish (show new growth).

Which county are you in? What is your soil texture?

Santa Rosa Gardens of Florida says that the M. cappilaris "Pink Cloud" is a darker pink and more drought tolerant than other varieties.

It is a wide ranging plant and it probably are some differences in how xeric they are from where they are collected. There is also the natural hybrid between M capilleris and M.lindheimeri. "Pink Flamingo Grass". That probably is more xeric also.

(BONAP) The Biota of North America Program / www.bonap.org is a great source for mapped populations of native flora by county. Here is the map for Muhlenbergia capillaris:

I wonder what that Pan Handle one looks like. I saw M. capillaries growing in plantings in New Mexico and they were almost purple in comparison to the light pink that you see in tended plantings around here.

Also if you are growing it roughly, it might take a few years for it to start blooming good.I have one plant that was sent to my from a friend who grows lots of grasses and this plant was supposed to be Pine Muhley but its blooms look like M. capilarris but not quite so cotton candy-ish. It is growing on a caliche/gravel scree, un irrigated on an uplands hill above the Hamilton Pool area(west of Austin).

I have a Pink Muhly grass that I planted nearly 20 years ago. It did well for many years. However, I have noticed that for the past 2 or 3 years, the plant is getting smaller. The guy who does my yard, does always cut the top off in the late Fall. I noticed in the first comment by Bostedo, that there are currently some beautiful plants at the library in far North Dallas. That comment made me wonder if the reason my plant has been getting smaller is because the yard person has been lopping off the top in the Fall. Comments and thoughts will be greatly appreciated.

Thank you all for the great feedback. I'm assuming the N. Dallas rec center/library WalnutCreek and bostedo mentioned is at Fretz Park on Hillcrest & Beltline? I haven't been by there in a couple of years, but will have to check it out on my way home from work one day. WalnutCreek, I've obviously never grown pink muhly grass, but from what I've read it sounds like it doesn't have to be cut back like some other ornamental grasses. At my last house in Dallas I would always wait to cut back my miscanthus sinensis until the first week in February.

Thanks, Indecisive. I will set up a reminder for myself to tell the yard guy not to cut it back next year.

Oh, and to clarify, I am in Collin County (Plano) Zone 8a - clay soil. Where I want to plant pink muhly grass is in the 4'x25' hell strip between my back 18" retaining wall+6' fence and alley. It's currently St. Augustine and I have a sprinkler system with what I think is an excessive number of sprinkler heads in this section seem to mostly water the alley. I figure I could either cap those (no irrigation) or convert them to drip/soaker hoses, but they share a zone with sprinkler heads in the backyard that water a St. Augustine area I'm keeping as turf so they probably wouldn't run long enough to properly soak. I moved into my current house in late August 2019 and I'm trying to find as many areas/ways to cut down on water use in my landscape wherever possible, as I now have to water enough to keep my slab foundation, four large red oaks, one large live oak, one huge pecan tree and St. Augustine happy. The amount of water this takes was honestly staggering compared to my water use at my last place when I had a hose end drip system garden and a bermuda lawn I would just let go dormant in late summer. That was probably more info than you all needed, but I felt like sharing.