I use Surflan Pro mixed with 24D. In my part of the Midwest, I spray it on the lawn in late March to early April and again in early June. I don't have hardly any weeds or crabgrass. I still struggle with spurge and clover though.

My experience has been prodiamine works very well on broadleaf weeds. I spray it in my flower beds for that purpose and it holds the fort.

Your post is a little confusing. If you are in a northern climate with cool season grass then you don't want to put premerg down in the winter and you certainly don't want to fertilize in Feb or March. Where do you live and what kind of grass is it? You still have time to put down a good premerge like Prodiamine if you get it down quickly (assuming you are in the north). The Lesco products you listed look like simple fertilizers and don't have anything to do with weed control unless the bag says something like "weed and feed" (which are not very good products).

What retail products have Surflan Pro or prodiamine? Or did you mix them yourself?

I live North East (DC area,) tall fescue grass. I was told fall pre emergent application can prevent weeds that geminate in late fall/early winter like chickweeds, henbits, etc. Lesco 19.0.7 is a crabgrass pre emergent with fertilizer, but I think it has dithiopyr/dimension, which isn't very good against broadleaf weeds.

Is there any granular thing I can put down in the entire lawn for post emergent weed control?

Surflan Pro is the name brand. The main chemical in Surflan Pro is Oryzalin. I would speak to the local Extension Agent in your area. Or, another option, is to find out who cares for the nicest fescue lawn in your neighborhood and ask him/her what they use. I've found that gardeners are more than happy to tell you all about their own garden and lawn care practices. Once you find out the chemicals they use, Google the names and find the best deal. I hope this helps.

Prodiamine can be found on Amazon, about $50 for a 5lb jug. Should last you decades. It has to be sprayed, so get a cheapo pump sprayer as well.

Thanks guys for the advice. Quick question: is this crab grass? How did it come up already only being early April, especially after all those crabgrass preventer had been put down in March

I read the label twice but cannot figure out the mixing ratio. It said 1 tbsp. per 1,000 sq ft. How much water to mix with 1 tbsp?

Also, how long after can I oversow my lawn? How often do I need to reapply it each year? I plan to put prodiamine down the first week of May to prevent crabgrass, oversow bare spots late August, then reapply prodiamine again late Sept to prevent spring weeds. What do you think?

For the 1 tbsp, as much as is convenient to get it down. I'm presuming Prodiamine granular? I use about ten gallons because I use a hose-end. One gallon would be more convenient in a backpack sprayer. I might lightly irrigate that in--ten, 15 minutes just to wash it off the leaves--but it's not necessary if you don't want to.

If you're going to overseed in August, go very light on the Prodiamine if you use it at all! It'll suppress out grass seed just like crabgrass, and CG likes sprouting in August as well. Good CG suppression through summer is going to mean very poor grass sprout in August.

Page 2 of the manual shows the bar chart for pounds per acre (roughly tbsp per thousand) for months of protection. 2 months (May to August) is off the bottom but...well, if we finagle a bit and estimate (which we really shouldn't do because we have no assurance that this remains linear off the listed scale), we'd come up with an estimate of about 0.33 lb/A or 0.33 tbsp/thousand application rate to achieve 2 months of protection.

(The linear equation is actually 5.2T + 0.2 for those who are curious, with T being tablespoons used by my estimate, but I'm just eyeballing it so you may come up with different answers).

Even so, some suppression of sprout is to be expected.

Post that, the grass should be on its third or fourth mow before applying Prodiamine again; it can kill young grasses. By late September, it's marginal, but you should be OK...still, it may slip into October.