For the life of me I cannot remember when I turned on my sprinkler system the last two years. I think all I did in the past was turn it on without considering the time of the year. Ive been moing my lawn for the last 3 weeks because of the rapid growth. So, my question is: When is a good time to turn on sprinkler system in the north east. I live in new jersey.
When your lawn needs it. It would be wise to install a rain guage to your system so that it only waters when needed.
I can't imagine for the life of me why someone would need to turn on the sprinkler system in the early spring. Sounds like your yard is growing fine for now. My best guess would be closer to Late May or June. Here in lower Michigan we just had snow showers the other day and some frost as well. My lawn is growing and it needs to be mowed for the second time. My lawn won't need water until July.