Wayde from Metairie writes
The Fertilome Weed Free Zone product label states that this product should not be used on dichondra because it will harm or even kill it. However, dichondra is not listed as a targeted controlled weed. Southern Ag Atrazine Weed Killer for St. Augustine Grass would be a better option as it is labeled to control dichondra and it can safely be applied to St. Augustine turf.
Answer last updated on: 03/11/2019