I picked up my Scott's Turf Builder/Crabgrass-Halter at Walmart, at the Online-Orders  Service Desk. I had a really positive experience when I picked up the fertilizer, because I notified the service desk, on my Walmart phone app, from the parking lot at the store, and by the time I reached the service counter, the Walmart associate greeted me with, "Hi!  Are you here for your fertilizer?" Now that's fast service!
 
   Come to find out, though, that the bag contents only covers 4000 sq. ft., instead of 5000 sq. ft, which I had thought was the coverage last year. That's okay - I'll make it work.

   After reading the back of the package, though, it apparently only prevents grassy weeds, such as: 

• Barnyard grass
• Crabgrass (large)
• Crabgrass (smooth)
• Fall panicum
• Foxtail, and 
• Poa annua.

   The only broadleaf weeds it prevents are:

• Chickweed
• Oxalis(yellow woodsorrel)
• Spurge (prostrate), with a repeat treatment for the spurge after 6 - 8 weeks.

   That's fine - I plan to fertilize with Scotts Turf Builder Weed and Feed, on around April 21st to May 1st.  By then, the spurge and dandelions will be up, and a few inches long, so the Weed and Feed will be the appropriate treatment, because the herbicide powder needs to stick to the wet leaves for at least 24 hours before watering to work.  The tricky part about that application is timing it between spring showers. If it rains too soon, your lawn will green up, but you'll probably still have dandelions and spurge.  I learned that the hard way, two summers ago, when that exact thing happened.  I was extra careful last Spring and Summer, and it was worth it. My lawn was really green and thick, and there were hardly any broadleaf weeds.

I highly recommend Scotts Turf Builder Weed and Feed

   Back to the crabgrass treatment, though - I had originally planned to apply it as soon as I brought it home, after I finished raking the lawn . However, it still hasn't rained or snowed, which is really nice to have happen about a day before, and then a day after, application.  I guess I'm going to have to hand-water after all, because the crabgrass is already germinating, and so are many of my perennial flowers; and it has been very dry, unless we have been getting a few drops of participation during the nights.