Grass can spread vegetatively through rhizomes that spread below the soil. ... New shoots known as tillers grow upward from the rhizomes of each plant. Each tiller that grows out from the grass can produce seed from its own inflorescence.

Will grass spread to bare spots?

Will Grass Spread to Bare Spots and Repair Itself? (Answered) It depends. Grass with rhizomes (under-ground runners) spreads laterally, and naturally fills in bald or bare patches on your lawn. ... If you have this type of lawn grass, you'll need a hands-on approach to fill bare spots with some compost and grass seed.

How long does it take for new grass to fill in?

The Long Road to a Successfully Seeded Lawn. Depending on the exact conditions and the time of year we plant, it can take anywhere from three months to a year from the day a lawn is seeded until it's fully grown in.