This browning could be a coincidence...it would depend on the ingredients in the herbicide part of the weed-and-feed and whether the product label stated it would be safe to use on established lawns of the type you have (fescue, zoysia). We discourage the use of weed-and-feed type products in general, mainly because they make it more difficult to apply either component - the fertilizer or the herbicide - at the most appropriate time, or in the most appropriate amount. If the product was overdosed or the grass was drought- or heat-stressed at the time, that may have lowered its tolerance, especially if the fertilizer "burned" the grass. It's also possible the product worked exactly as it should have, if some of the grass that browned was actually a weedy grass controlled by the herbicide.

We have many resource pages about all aspects of lawn care, but below is a list of those pages that might be more immediately useful regarding seeding and lawn care just after seeding. There will be a bit of overlap in the content between pages, and since fescue is the most widely-grown turfgrass type in Maryland, that is their focus, though we do address zoysia and others as well.

• Lawn Renovation and Overseeding - renovation is a complete re-do, overseeding just augments what's already there
• Starting a New Lawn
• Seeding or Sodding Lawns - a brief overview of when and how-to
• Grass Seed - what to look for when purchasing
• Care and Maintenance of a Lawn after Seeding - watering, mowing, fertilizing, etc.
• Lawn Maintenance Calendar for Tall Fescue - tasks for each season

Miri