After applying Poa Constrictor Herbicide
The Poa Constrictor
A second application of Poa Constrictor Herbicide
Floratam is not listed on the Poa Constrictor label as having been tested for tolerance (only Raleigh St. Augustine is specified). Since Floratam is notoriously sensitive, and the product label does specify that the herbicide may cause discoloration on St. Augustine turfgrass, we recommend testing an inconspicuous area for tolerance before treating the entire lawn.
No, Poa Constrictor Herbicide is only labeled to be applied on your lawn.
Poa annua germinates primarily in the fall, and turf type Tall Fescue is also typically overseeded in the fall rather than spring, because this is when the seed takes best in the year. That is likely why the Poa Constrictor label states only fall instructions in the seeding and timing rate table on the Product Label. In general, if its safe to be used in the fall, you should be able to do the same in the spring, its just not the normal season, and you would only get spotty poa annua prevention since the majority of the cycle occurred this past fall/winter.
There is no wait time to apply
Poa Constrictor Herbicide should be stored in a cool, dry place and has a three year shelf life from date of purchase.