Quote:
Originally Posted by mikreb
Since the pre-emergent didn't work sounds like your weeds are perennial. For St Augustine Provista use glyphosate 41% to kill the weeds. Tractor Supply and Rural King are the only places around here that sell glyphosate. If your lawn is not actively growing then mix the glyphosate at 50% or wait until spring to apply.
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You can also buy Hi-Yield Killzall which is 41% glyphosate. They sell that at all the home improvement stores and Ace and also Amazon.
I was told that I have Floratam St Augustine by the original installer but all my neighbors say they have ProVista. I bought some Killzall and tried it on a test area in my backyard and it worked great. It killed crabgrass, Bermuda grass and torpedo grass but didn't harm the St Augustine so I must have ProVista.