Fertilize ryegrass that is overseeded about October 20 or later with 60 to 70 pounds of actual nitrogen at planting time so the grass can get maximum growth before cold weather. Princess 77 Mixing annual ryegrass seed with fertilizer and broadcasting it using a spinner truck or buggy is an option, but annual ryegrass seed is lighter than fertilizer and will not spread as far with a spinner. | Fertilizers Click to see full answer Beside this, does ryegrass germinate in cold weather? At Jonathan Green, we mix elite varieties of Kentucky Bluegrass seed as well as tall fescue and perennial ryegrass to create our Black Beauty® Ultra grass seed mixture. Dry soil conditions will delay germination. To avoid skips and gaps, split the middles to get more uniform application. Expected growth – If properly seeded (instructions above followed) one can expect to see 2- inches of top growth before a hard killing frost. Turfhelp.com,