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I am refering to a lawn of grass. While I know each blade of grass cannot live forever, I never see a lawn thining out due to grass simply dying of old age. Most lawns are never allowed to grow tall enough and for long enough to produce new seeds to replenish the lawn. I would be very impressed if anyone can answer this question satisfactorily :)

2007-02-16 02:44:39 · 7 answers · asked by leonardjos 2 in Science & Mathematics Botany

7 answers

Grass are perennial plants. That means they live for several years. The aerial parts may die off but the undergroung stem and root system stay alive to give more vegetative parts when the conditions are favourable.
Have a look at the underground stem of a grass in the link below. Those underground stems are called ‘stolons’
http://www.backyardnature.net/stemtype.htm

In lawn grass these stolons can be found both above or below the surface of the earth. Grass reproduces not only by the seeds, but also by these stems. They can be actually help the lawn to stay alive and spread in it’s area, even if we do not allow the grass to flower and produce seeds.

2007-02-16 09:18:00 · answer #1 · answered by Yarra 3 · 0 1

Some grass is an annual, meaning it dies and grows from a new seed each year. Other grasses are perennials, and they establish long lived root systems in the soil that continually send up new blades of grass.

Sometimes lawns are from the perenial grasses that do not die off each year, but other lawns are composed of several sets of grasses that grow from new seeds each year. The lawns relying on annuals are usually in places with a lot of snow that would kill the perrenial grasses (the other alternative is to bring in sod).

2007-02-16 17:55:35 · answer #2 · answered by Dr Fred 3 · 0 0

Individual blades of grass die.

The lawn is a collective system. It shares water and energy through its root system.

That is why it continues to grow & look green even though it never grows tall enough to re-seed.

From the network of roots the new blades of grass grow.

I live where it gets cold during the winter and the grass dies in Nov. but starts to green up in April.

Further proof: In order for grass seeds to germinate the outside temperature has to be no less than 60 degrees.

If people's grass only grew because of re-seeding, you have to wait until May-June to see a green lawn.

2007-02-16 15:18:57 · answer #3 · answered by Ronatnyu 7 · 0 0

Unfortunately it does. Grow yourself a small patch of grass in a planter or an old aquarium or whatever, take good care of it,water regularly,feed regularly,be sure it gets plenty of sun and when you're ready stop all of the above and you will see it decline and die.
External lawns don't seem to die because people are constantly reseeding them so there is no need for them to go to seed and they can have a LAWN otherwise they would have a FIELD of grass.

2007-02-16 11:06:00 · answer #4 · answered by xxx 4 · 0 0

Some grass such as Bermuda dies back in the winter but the roots are sometimes 3 feet below the surface and it renews itself Thur propagation.There are different types of rye grasses that are annuals while others are perennials.Fescue is basically a cool weather plant that has a good longevity but needs to reseed usually on a yearly basis.It's either the roots or seeds....

2007-02-16 22:33:47 · answer #5 · answered by Rio 6 · 0 0

Yea it dies. Grass grows from rizhomes, and stolons, as well as seeds. So the roots produce new grass shoots that grow new blades of grass. That is how grass can "creep" across an area.

2007-02-16 17:31:56 · answer #6 · answered by Larz 1 · 0 0

Yeah, sure it does...
But before it does, some other filament of grass might have come in its place..

2007-02-16 13:11:54 · answer #7 · answered by Satrohraj 4 · 0 0

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