Rye grass seeds generally take between five and 10 days to germinate and start displaying sprouts. It then takes another month or so for the grass to establish into a typical lawn.
Climate conditions and other environmental factors play a heavy role in determining the exact timing of full germination. Similarly, grass maturation rates also vary depending on the turf, the local area and the species type. Rye grass is an annual seed type and can grow quickly, even in cooler temperatures. For this reason, rye grass is one of the most popular grass types for both lawn and pasture purposes.