Centipede requires half the dose of nitrogen that St Augustine, and if Im not mistaken Scotts doesn’t tell you to use half the application rate on the centipede. I also have a centipede front and St Augustine back. But there is a narrow window of time that you can apply a weed & feed product, whether it’s Scotts or another brand, and get the benefit of both the weed and the feed activities. Weed & Feeds are no more than a convenience product for the consumer to try to kill two bird with one stone. Many of us prefer to control weeds and fertilize lawns as two separate activities when the timing is optimal for both. I think the shade you are referring to has more with the use of combination weed & feed fertilizers in general, regardless of brand or who makes them, because often it’s to early to fertilize lawns when weeds need to be treated, and if one waits for the proper time to fertilize then you may have missed the best time to treat weeds. I think a fairly high percentage of the Scotts Bonus S lawn fertilizer has fast release nitrogen so you are going to see the results fairly quickly if the grass is in active growth.

Bonus s