We have an established pasture that has been taken over by buttercups! Does anyone know what is the best way to deal with this? 1) Using a broadleaf weed killer, then re-seeding 2) just re-seed and hope the new seeds will crowd out the buttercups The weed killer will kill ALL broadleaf weeds which will include clover and any other legume that is there. We will re-seed with a pasture mix which will probably put these back. Lime, fertilizer and what else to keep them from coming back? And how to re-seed? Is there a special machine we can rent?