How do I know if I need a pre-emergent or post-emergent fertilizer?

<a href="https://www.homedepot.com/b/Outdoors-Garden-Center-Lawn-Care-Lawn-Fertilizers/Pre-Emergent/N-5yc1vZbx6bZ1z1cns1?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">Pre-emergent fertilizer</a> is applied before weeds sprout, preventing them from growing. <a href="https://www.homedepot.com/b/Outdoors-Garden-Center-Lawn-Care-Lawn-Fertilizers/Post-Emergent/N-5yc1vZbx6bZ1z1cnso?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">Post-emergent fertilizer</a> is applied after weeds have emerged, to kill them.

Which granular lawn fertilizers brands are available at The Home Depot?

We carry a wide variety of the top brands of granular lawn fertilizers, such as <a href="https://www.homedepot.com/b/Outdoors-Garden-Center-Lawn-Care-Lawn-Fertilizers/BIOADVANCED/Granular/Kills-Dollarweed/N-5yc1vZbx6bZxosZ1z1dax7Z1z1zibg?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">BIOADVANCED</a>, <a href="https://www.homedepot.com/b/Outdoors-Garden-Center-Lawn-Care-Lawn-Fertilizers/Vigoro/Granular/Kills-Dollarweed/N-5yc1vZbx6bZ1ktZ1z1dax7Z1z1zibg?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">Vigoro</a>, and <a href="https://www.homedepot.com/b/Outdoors-Garden-Center-Lawn-Care-Lawn-Fertilizers/Scotts/Granular/Kills-Dollarweed/N-5yc1vZbx6bZ3qjZ1z1dax7Z1z1zibg?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">Scotts</a>.

What are some of the best-selling granular lawn fertilizers?

One of our best-selling granular lawn fertilizers is the <a href = "https://www.homedepot.com/p/Scotts-Turf-Builder-26-64-lbs-8-000-sq-ft-Southern-Triple-Action-Weed-Killer-Fire-Ant-Preventer-Lawn-Fertilizer-26008A/302682012?emt=plpfaq_2408_fertilizers" style="text-decoration: underline;">Turf Builder 26.64 lbs. 8,000 sq. ft. Southern Triple Action, Weed Killer, Fire Ant Preventer, Lawn Fertilizer</a>.