Yes, Sedgehammer Herbicide can be used on St. Augustine grass.
Sedgehammer should not be used in and/or around any desirable vegetation. The only item that can be used inside of a food plot would be glyphosate products.
For optimum results, do not mow turf for 2 days before or 2 days after application of SedgeHammer Herbicide.
SedgeHammer Herbicide should not be applied around groundcovers, ornamentals, vegetables, shrubs, trees, or flowers. It is to be applied to turf areas only. You can look at using a product like Image Kills Nutsedge Concentrate as it is labeled to be applied to Liriope.
According to the manufacturer, after applying Sedgehammer Herbcide it is recommended to wait 2 weeks to overseed on existing lawns and 4 weeks on bare ground lawns (dirt).
SedgeHammer Herbicide is not labeled for poa annua so would not be recommended. It is also a post emergent only and does not prevent anything.
SedgeHammer Herbicide can be applied 4 weeks after seeding.
Per the label of Sedgehammer Herbicide, this product should not be applied over the top of desirable vegetation. We would not recommend using this product within the drip zone of a tree.
SedgeHammer Herbicide works best applied when temps are between 60-70 degrees.
SedgeHammer Herbicide is considered a post-emergent, therefore the weeds need to be actively growing in order for this product to work successfully. Please let us know if we can be of any further assistance.
It is safe for pets to be in areas treated with SedgeHammer Herbicide after the treated areas have completely dried, which is usually about 4 hours after application.
SedgeHammer Herbicide will work in a succulent bed, but you would want to be careful not to let the product touch any of the plants, so you would only need to do spot treatments. The product may do damage to the succulents if it were to get on them.
Sedgehammer will only control weeds that are actively growing, so it likely will not kill anyting in the winter once the plants are dormant, and it may only give partial control in the fall. It is best used in the warmer spring and summer months and early fall.