Yes, but it takes a while. Dry Sphagnum will rehydrates when kept very wet and sprout new growths within a few months.
Personally, I enjoy collecting and cultivating different species of Sphagnum that I find in the wild. I take a few springs from each species I find, just enough to allow it to grow back within a few months.
Lucky! Too bad there arent any spagnum fields in california
I've still got a little bit of LFS available.
My domain name has expired. So not currently.. but I can be found here 24/7.
Yup, that's Sphagnum. There's no way I can ID it because the growth head is way too small.
I was about to say, there are definitely Sphagnum bogs in California, they're just in the northern part.
They should during winter if kept outside. I've noticed the Sphagnum doesn't slow down as much as vascular plants in cold weather. It doesn't need consistent dormancies from my experiences either.
Sphagnum rarely browns during dormancy, which makes it very easy to find this time of year. I'd leave a little patch of it next to the greenhouse, just to keep a natural setting for it.
if its got roots it aint sphagnum
That's pretty much how I culture mine, minus the soil. It's incredibly useful to grow for a variety of purposes. Plus, it just looks cool.
Technically if it has roots then it isn't a moss at all. That being said moss do have rhizoids, which look like roots.