As far as I know it’s not used for any type of animal or human food. I see on google that some places sell it as a ground cover because of the way it looks (my wife LOVES it). It is a really pretty grass when mature. Also noticed the sellers mention that it was deer and other critter resistant.
First I ever saw was on our pasture about 20 years ago. Just a lonely clump blowing in breeze. A professional seed man was on our property (we were getting reseeded after a power line cut across us). He spotted the clump and was Really excited and asked if he could get a sample.
That land burned badly in 2011 but my wife had some seeds lost in her purse. Lol We planted a couple year before last here at our new place and rest is history.

Sorry to all for long answer.
Really interesting that you have a sorghum that acts the same way!
Ours is not the sorghum that is grown for feed, it's a native annual species and is by far the dominant grass species that forms the understory of our tropical open woodlands and savannahs. It is certainly not pretty. It germinates in October (or later if the rains are delayed) and matures in March, when it sends up seed heads 5-10 ft high. They drop seed and brown off in April, when the last of the wet season storms (known as 'knock-'em-downs) blow them over and mat them up, leaving them ready to burn. We burn off this understory from April 'til July, by which time the air is too dry for lighting fires as the fires no longer go out overnight, and from July to October can burn for weeks on end.










