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.
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.
For optimum results, do not mow turf for 2 days before or 2 days after application of SedgeHammer Herbicide.
SedgeHammer is a post-emergent herbicide, so it will work on actively growing nutgrass, but will not prevent future growth. Pennant Magnum and Echelon 4SC would be pre-emergent options for nutgrass.
SedgeHammer Herbicide works best applied when temps are between 60-70 degrees.
Yes, Sedgehammer Herbicide can be used on St. Augustine grass.
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 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.
SedgeHammer Herbicide can be applied 4 weeks after seeding.
SedgeHammer Herbicide packets do have surfactant in the packet already. You do want to use a surfactant if you are using the bottle.
SedgeHammer Herbicide could not be used as an over the top on jasmine. You would need to carefully direct spray only to the target weeds, avoiding direct contact with the desirable jamine.
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).