How Long Does It Take for Grass Seed to Sprout?
Grass seed can take anywhere from five to 30 days to sprout, depending on the type of seed planted. Rye grass is one of the quickest to sprout, while Bluegrass can take up to several weeks.
Grass To Seed Out
Stop mowing the grass in the area that you want to let seed out. In dry conditions, water the grass as needed to ensure that it continues to grow and thrive. Wait for the seed heads to develop completely and begin drying out. Harvest the seeds by grasping the stalk with one hand and sliding the fingers of the other hand up the stalk and over the seed heads; provided that the heads are fully developed, the seeds will come loose between your fingers. Mow the lawn after harvesting the seeds, setting the blade high so that you remove no more than one-third of the grass height in the first cut. Store harvested grass seed in a cool, dry location.