What type of lawn (grass) do you have and where are located? This will play a factor in the type of herbicides you can use.

I use a 2 gallon pump sprayer for my 1/2 acre tall fescue lawn. Triclopyr is my choice as it will take out most any broad leaf weed. Concentrate is definitely the way to go as it will be much cheaper in the long run plus this allows you to only treat the weeds.

A good pre emergent early spring will help in controlling weeds. I would love to put it down again in late summer/early fall however I always have to reseed in the fall due to losses over the summer. I use Prodiamine in a pull behind sprayer and have had very good luck with it.

You cannot use those herbicides on St Augustine, but for most other grasses, those are good plans. The 2,4-D product goes by the name Weed-b-Gon. For clover you want Weed-b-Gon Chickweed, Clover and Oxalis Killer. These weeds seed quickly, so you might have to use them a couple times a year. Make the first application in mid April.

You were right to split the weed and feed into separate applications. Timing for herbicide is April while timing for fertilizer is late May. If you mix the two and apply only at one time, you miss the best effect of one or the other product.

I live in southern PA and my lawn is a mix of bluegrass, perennial rye and creeping red fescue.

You probably know this already, but when using the concentrates mixed in a pump sprayer, in lieu of the over-priced "drug store" spray bottles it's beneficial to mix in a tablespoon of dish detergent or soap per gallon. This removes surface tension of the liquid and thus helps the product stick to the leaves of the weed upon application for greater effectiveness.

Remember the best time to apply herbicides is when the weeds are "actively growing". What this means specifically, is after a rainstorm or irrigation for a few days. During periods of drouth and/or high temperatures - above say 90° F - the turf will often be damaged by even light herbicide applications, yet the weeds will be unscathed. Many turfgrass weeds have deep taproots and handle drouth well, and waxy, tough coatings on their leaves.

When both moisture levels and temperatures are at normal levels is when weed control is most effective, the weed leaf opens up their stomata and their defenses are down. Muhuhuhaha!!!

The concentrates Ted is talking about can be had at your local feed store. Check them out and get a good tank sprayer or a hose end sprayer.

April is usually a good time to spray because just about everyone in the US has had a drenching storm that germinated all the seeds.

Hey guys, thanks so much for your detailed replies. Really helpful stuff, and now I have a prepared system for how to deal with this.

Thought of another question:

I have two pump sprayers: one I’ve used for roundup and one I’ve used to fungicide (and I’d like to continue using for fungicide). Which one should I use for this, or should I buy a new one?

My lawn is 1/2 acre with woods on the back side. I have a 2 gallon pump sprayer for spot treatment and touching up small areas. I also have a 30 gallon pull behind that is mainly used for blanket spraying pre m, fungicide, and iron applications where I need good, even coverage on the entire lawn and also use it for a power line right of way where I spray Round Up. I have sprayed weeds at the edge of the woods with Round Up and in the same day spot sprayed the lawn with a selective herbicide like Triclopyr or Tenacity with no issues. Just be sure to rinse the sprayer out prior to switching between products and make sure you run clean water through it to clear any leftover herbicide from the hose and wand. Been doing this for years with the same sprayer.

So Triclopyr would be a good choice for clover and Indian strawberry, correct? Also, I have some onion grass in the front yard which I don’t think I’ve ever had before. What should I use to get rid of that?

Looking at using this Triclopyr herbicide: https://www.amazon.com/Triclopyr-Compare-Garlon-Remedy-Quart/dp/B00M8C4YNM/ref=sr_1_2?s=industrial&ie=UTF8&qid=1523742218&sr=1-2&keywords=triclopyr#customerReviews

Can someone verify if this is the correct thing for me? I do have some trees in and near the yard that I don’t want to kill....