Maria
Depending on where you live and what grass you have, those may not be
grass seed heads. There is a nasty weed called poa annua,commonly referred
to as annual bluegrass. Last year my "grass" was going to seed head almost
immediately following a cutting. I started to do research on how to break
the cycle and I came upon this nasty weed that looks just like bluegrass. If
you can post a picture I can help you identify, or type in poa annua in your
search engine and see if you can identify it yourself. Hopefully you dont
have this, because you really cant do anything about it. It will die out
with summer heat.
Back to your original question. I dont know about the effects of the "grass"
seed, but your lawn will turn yellow if you cut off more than a third of
the height of the grass in a single mowing. Also, with grass being that
high you run the risk of lawn disease because the grass underneath never
gets a chance to dry out. Let me know what you find out
Jeff
"Maria" wrote in message
...
Hello:
I recently seeded few bare patches in my lawn. Since the seeds were
germinating I did not mow the rest of the lawn to try & avoid damage to
the
germinating grass.

Now, I find that the rest of the lawn is really overgrown & most of the
orignial grass in now sprouting seeds. I did not know whether this would
be
helpful or harmful to my existing lawn.

My question is, if seeds are allowed to form on grass will they be a
direct
source of additional seeds for my lawn or is allowing grass to sprout
seeds
detrimental to the lawn in any way.

TIA
Maria