The hard part is weeding inside the clump of native grass, particularly distinguishing, say squirrel-tail or zorro fescue from a perrenial native fescue. It can be torture.
I don't have the time to tackle the English grass the way it should be done.
The English grass really, really likes the river bottom soil, while it avoids the dry, higher hill-ground where the native plants are doing well. I have a forest buffer between the river bottom and high ground, so that may be the reason the English grass doesn't venture beyond the river bottom area.
I'll probably move native grass plugs this fall into the river bottom and see if it takes in spring or is overwhelmed by the English grass or eaten by the stupid, big fat deer that's probably gained 4,000 pounds eating my plants.
I don't know what "hit with pre-emergent" means or reseed with "lotus," Is "lotus" a California plant?