Weed invasion has to be the most frustrating part of seeding a warm season grass.Mattblack15 said:According the the extension office the centipede should do well, since it prefers acidic soil. It's. Been a week today since ive put the seed down, no germination as of now but The bag says anywhere from 14-45. Days. What do I do about the weeds that have came up as of now? Let them be or clip them down with a weed eater?