If you want to
learn from some experts, and not simply take random suggestions from neighbors, read the material from Florida based horticulture experts. The first offers a broad view of weed management with very specific recommendations. The second dives deeper into how herbicides work, along with detailed descriptions of almost all herbicidal products.
Especially:
Weed Management Guide for Florida Lawns
and:
Turfgrass Herbicides: Mode of Action and Resistance Management
BTW. I would rather hear from these academic specialists, than from the lawn care professionals who only want to sell their own service, or the random guy at the store who probably doesn't have enough background, Tommy at Wildwood Ace Hardware excepted.
