Posted: 21/05/2014 at 09:01
C.J. Personally I think you've over done it in too short time scale.
This is all just my personal opinion so please feel free to disagree
I think you started a bit late with the treatment(s) and then have rushed everything since. I applied the Westland Lawn Feed with Weed and Moss Killer back in march (I feel this has a little lawn feed and more weed and moss killer), then scarified in April. I then applied a very light top dressing late April and have only last week applied the Evergreen 4 in 1 (I always feel this is more lawn feed than weed killer, opposite to the above product). Apart from that, I have cut the lawn (twice a weekat the moment) and that's it.
At this time of year I really don't think the lawn needs watering at all, the odd shower and dew through the night keeps the ground damp enough. I think you have over watered with the sprinkler twice a day. The grass drying out does it no harm at all and may even kill the odd weed, especially in the height of summer. Also, with letting it dry out a bit your encouraging the roots to dig deeper and making the grass stronger.
I would advise with your lawn to calm down with the chemicals and the watering, give it the odd rake by hand and keep cutting once or twice a week. Rather than using patch magic, grab yourself some good quality seed, mix it with a bit of soil and spread where your patches are, they'll recover in no time at all. Also over seed the rest of your lawn, it's amazing what a bit of overseeding can achieve.
If your have to cave in to your watering needs, use a watering can and just keep your patches where you've spread the seed damp, maybe a little water once or twice a week maximum.
Keep us updated, would love to see the lawn in June/July looking lovely and lush