Hi there
In 2016 i completed the removal of runner_ grass from my front yard covering it all with catdboard and news pappers and all manner biodegradable matter that blocked the daylight to kill the grass. It worked. (except my neighbour has the same vrunner grass and does not controll it on any boundaries so i still have that edge which i am about to dig along with a narrow spade deep
enough to insert equal lengths of "root boundary / barrier" so it dies no infiltrate again especially if I attach the top edge of the
root barrier to the base board of thr
fence).
On top of the blackout
cardboard i spread bought
wood chip.
And now 2021 all that has disolved well and truly but the no grasses noe weeds continues. My paths are covered with hand broken or machine chipped homegrown branches. Honegrown chips.
Anything that is not a pathway is bedded with food potential
Permanent and seasonal. Fruit
trees and shrubs eg blue berries. And vege beds. Herbs etc.
Volunteer veges and greens.
I would suggest to you why not source
local hatdy wild flowers to compliment what you have in mind?
Others will have specifics about grasses and herbs i suspect.
But more about your area.
What size and scope aspect and desugn do you have.