I live in the Northwest US (aka the Great North Wet) and late
last fall i had an irrigation system installed. Its turned off
now , but I'm looking ahead to spring and summer, what I am
wondering about is:

Whats the best time of day to water?
How often?
And how long each time?

I also plan to slit-seed my lawn this spring to get a consistent grass type
and to crowd out any weeds.
Comments?
Thanks
Eric