Group 1 - Any triple action or more combination, comes in one bag, granular and you spread with a fertilizer spreader.
Its complete, all in one bad Season Long Weed Control, Crabgrass Preventer/Control, Weed Killer and Fertilizer.
Such as brands below,
Walmart (Expert Gardner), Lowes (StaGreen) Bayer/Bioadvanced, Maybe HomeDepot Vigro
One Blue Bag is all you need! It kills lawn weeds. It prevents new weeds. It kills crabgrass. And prevents new crabgrass. Plus, it feeds and greens up to 3 months.
bioadvanced.com
Sta-Green 3XTREME Action 43.2-lb 12000-sq ft 18-0-1 Weed Feed Weed Control Fertilizer
Item #888059Model #2149602202
Group 2 - Then if needed a liquid spray a couple months later but you could also use the liquid and regular fertilizer too. I prefer the first application above in group 1 granular form as it is also crabgrass control.
Then below
Available in any home improvement stores and online Amazon ect. You can buy the bottles with a sprayer or concentrate solution without the sprayer. Just make sure you use the Season Long Weed Control - NOT THE Season Long Weed and Grass Control as you will kill your lawn.
BAYER ADVANCED Season Long Weed 32-fl oz Hose End Sprayer Concentrated Lawn Weed Killer
Post-Emergent: Kills existing listed broadleaf weeds Won't harm lawns Apply anytime spring through fall when temperatures are between 50º-90ºF
bioadvanced.com
Proprietary 2-In-1 Formula kills existing lawn weeds and prevents listed weeds from emerging for up to 6 months.
bioadvanced.com
I always apply "Group 1" first, then regular fertilizer every 5 weeks or so after that, 3 to 4 times a year.
IF by some chance, however rare, I may apply Group 2 in the middle of the season for additional weed control as group one at some point will start to wear out.