So being this is my first summer in my new place. I have roughly. 1.25 acres of lawn with 42.5k irrigated. I threw down fertilizer May 28th with a new spreader. I probably put down around .75lbs of N per 1k from what I can calculate. I didn't do a cross pattern and I can see a darker green from the paths that got more directly behind the spreader. Would you guys put a small app down now to help even it out a bit before we get into the summer heat?Or now that we are in a dip in temps for a week atleast. Or just deal with it and get some FAS, and other N EXT bio stimulants down?
I used to be a no fert in Spring / Summer type guy as a "living in the rules of the past, having forgotten the reasons for them," but I am learning it's really better to stike a balance between keeping it healthy but not overly lush. If it is healthy then no fert, but if it's showing signs of deficiency, give it some of what it needs. Cool season turf and N as the weather warms is like a kid with ice cream; it will take up more than is good for it.
You should always start with a soil test to see where you are with P, K and the important micros for your location.
If the overall health of the turf is good (even though uneven in color), and P, K and micros are right, I would hesitate to feed it more N at this time of year.
If it's showing signs of N deficiency (old growth going lighter green to maybe even slightly yellow), give it a low rate of slow release N with some K and keep an eye on the response. If new growth is going lighter green to even slightly yellow, suspect iron deficiency. If it just doesn't look too great overall, could be both.