5-6 ft upright grass
I'm new to the OG forum and I 'm hoping you can give me some input. I'm looking at redoing a border and want a tall, upright, clumping grass for the backdrop. I'm thinking of sorghastrum, Blue Hills, but am certainly open to suggestions. Any pros, cons etc. to that grass or suggestions for alternatives would be appreciated. Also, I'm in zone 4. Can I still plant this summer/early fall or should I wait till spring? Thanks for any input you can give.