"Mitko" wrote in message
oups.com...
Thank you so much for your reply. I try to do my best and water and mow
on a regular bases - mow (1 per week) and watering (1 per 2 weeks if
there is no rain).

The problem is with the weeds and specifically the blue ones. They seem
to be taking over the grass slowly but surely. I would prefer not to
replace the grass because it will be quite costly. This is why I was
looking for chemical solutions to fight the weeds. Still the ones I've
used so far are not help at all.

Replacing the lawn will be a lot of work, but not costly. In fact, I would
guess that you will spend more money on weed killers than on lawn
renovation. You can kill the lawn with some Round-up, or better, rent a sod
cutter and physically remove it. I would then rototill the area, rake out
any debris, level, seed, spread some starter fertilizer, and cover with
straw or a thin layer of compost. You will need to keep it moist for a
couple of weeks. If you don't do this right away, you should wait until
fall to do it. You should contact your state's cooperative extension
agency. Every county has an office. They can give you some specific
recommendations for grass and other help on lawn care.