New Zealand clover
When to plant. Need erosion control on hillside forbrains
Coos County Oregon ground cover
Thank you for your question about ground cover. I'm not sure I understand what "forbrains" means, but here is a link to a brief article about white (New Zealand) clover, and a second article which goes into much more depth about the techniques and options to white clover to control erosion. Both of them note that cover crops should be seeded between August and October, so you may have missed your opportunity this year.
I hope these are helpful. If you have other questions, please write back. Good luck!