No, Snapshot 2.5 TG Herbicide should not be applied to bedding plants or areas where bedding plants will be planted or transplanted within one year following application.
Per the product label, do not apply to these areas until soil or potting media has been settled by packing and irrigation or rainfall and no cracks are present or injury may occur.
Snapshot 2.5 TG will not prevent tolerable species from growing only prevents weed germination in these areas if applied at the correct timing and rate as directed.
Snapshot 2.5 TG - 50 lbs. herbicide contains Isoxaben 0.5% and Trifluralin 2%. It does not contain any mesotrione. You can view products that contain mesotrione here.
Snapshot 2.5 TG Herbicide is safe to use on hydrangea plants per the product label.
Snapshot 2.5 TG Herbicide - 50 lbs. is safe for established perennials. Make sure you read instructions to your specific plant on label. If you have any ornamental bulbs there is explicit instruction on page 9 of label .
Snapshot 2.5 TG Herbicide is not labeled to prevent mugwort and will not kill anything actively growing nor is it for use in lawns. According to an article from the NC extension office there are no pre-emergents for it.
Depending on the type of grass you have Quincept is labeled to control it as a post emergent application.