Follow the directions on the bag. What did it say about watering?

24 hours later.

Just watered it. Took forever. But those salts needed off my blades since it's gonna be 90 today

Not that anyone cares but looks like I did the right thing.

We strongly recommend against using weed and feed for this and other reasons. If you have weeds, the best course of action is to buy a small pump sprayer and spot spray. This allows you to split your herbicide and fertilizer applications, because their timing is not always the same. Also, you're not throwing herbicide over the whole lawn when only a small amount would do.

Yes, you did the right thing by watering. So sorry, didn't realize you wanted discussion instead of just a quick answer. With any product you should read and follow the instructions. A weed and feed has a conflict: for the herbicide to be absorbed it needs to stick to the leaves for a certain amount of time while the fertilizer ought to be watered in as soon as possible. So there is a compromise. In general it's better to use separate products, plain fertilizer to fertilize and plain herbicide to kill weeds. That way you can apply fertilizer at the correct times to fertilize and kill weeds when necessary, which is probably not as the exact same time as fertilizer is advised.

I actually did spot spray quite often before resorting to w&f. But it soon became apparent that the weeds were to well established and I was losing the battle. Also, my lawn wasn't treated for at least 4 years and figured a boost of 28 N might help green it up before putting milorganite on it in 6 months.

thanks for the comments j4 and Becky.

Why Milorganite in six months? That's the middle of November. Milorganite needs warm soil for the microbes digesting it to be active. Don't know where you are but for a northern yard of fescue and KBG, early fall (which might be mid August for you) is the best time to apply Milorganite in the fall. The late fall fertilizer application after the grass stops growing but before the ground freezes should be a fast release synthetic nitrogen. The microbes are slowing down to take their winter nap by then.

I did. I used Ortho Weed B Gone... without a hose extension, but managed to get most of the yard then spot sprayed later and ultimately resorted to w&f.

I meant 6 weeks. Haha. So sorry.

i want to try to follow the schedule provided by milorganite; July 4th being the second of the year, but the first for me... then follow with milorganite the rest of the provided schedule.

After fertilizing Monday morning; I dont know, maybe wishful thinking but it looks greener. Is that possible at this point?

You never fertilized before. Don't be surprised at the sudden greening, that's totally possible

In the broad sense lawn care is pretty simple, but there are a few subtle nuances that can bite you.

The instructions for the wnf product should have said to water immediately before using it and then again 24 hours after application. That gives the herbicide a chance to stick to the plant, do its job, and then wash away before the slow release fertilizer dissolves on the grass blades. This water before and after process is such a pain in the butt most people skip one or both, or they apply like a fertilizer to dry grass and wash it off immediately after. If you don't get the application just right, you not only wasted the herbicide part of the product, but you essentially contaminated the soil with the herbicide until it "goes away." Also, herbicide is usually needed in mid spring while the first fertilizer of the year is not needed until late spring. So it is hard to apply correctly and the timing for the product is off. I think this pretty well summarizes why weed n feed is not recommended...at least by real humans in all the lawn care forums. It's sort of too good to be true (stay away).

The reason regular fertilizer needs to be watered immediately after application is that if it sits on the grass blades and gets only slightly moist from the next day's morning dew, the fertilizer with be highly concentrated in the dew and will burn the grass blades. Whereas if you wash the fertilizer down to the soil immediately, this process washes the fertilizer off the blades and dissolves the fertilizer pellets to a more dilute concentration down into the roots where it is needed.

I watered exactly 24 hours later and again that evening. I also watered again this morning and will this evening again. It looks fine and does look a bit greener. I'm pretty satisfied so far. Thanks!

Btw, I did apply to morning dew. And watered 24 hours later.

So look like I'm good according to what you've said dchall.