All three ( Big Bluestem, Indiangrass and Side Oats Grama) are easily grown from seed, so if the seeds ripen and are broadcast, they will create volunteers, especially in a favorable garden environment. Only you can decide if it's "too aggressive."

Side Oats is a bunching sod-former, like the other two. The extent of the sod will expand in time.

Thanks Don. I ended up using all of the grasses, keeping in mind their tendency to spread. Hopefully I won't be plucking too many grass seedlings out of the Opuntias.

I'm going to try some big bluestem, snowy woodrush, and Prairie dropseed from seed as well.

Mike

You'll love Luzula nivea. I started about a dozen small clumps from seed about 10 years ago, and now have several large patches of it throughout the garden. It's mostly evergreen for me, and from the hairy foliage to the gorgeous blossoms, it's a real winner.

Do you recall if you stratified the seed? I suspect I'll have to wait until next season to add this one to the garden. The woodrushes look like an interesting group. I have a soft spot for woodland sedges as well. My favorite sedge has to be our native plantain leafed sedge, an incredible plant to see growing in a large colony.

Mike

That all sounds fabulous...please post some photos...I'd love to see!

I wintersowed the Luzula, Mike. They were sown in January and they started germinating in April.

Thanks Don. I will wintersow the seeds and hopefully have a nice crop of new plants next spring. I already feel like expanding the front bed so that I will have room for the Echinacea paradoxa, Eryngium yuccifolium, Prairie Dropseed, and Big Bluestem that I will be wintersowing as well.

Scottyboi I will take some photos once the plants put on some size. The grasses for the most part were gallon sized or larger but the milkweeds and Echinacea pallida were in small 4" pots so they will take a while before they look like much.

Mike