Crossbow Herbicide could harm alfafa in a hay field, especially if applied when temps are above 85 degrees.
Crossbow Herbicide could possibly harm holly but it is not labeled for this plant so we cannot recommend it for controlling/killing it. Holly shrubs would need to be treated like trees, in which case you would cut the shrubs down to stumps and then treat the fresh cuts. Crossbow Herbicide is labeled for the control of most kinds of unwanted trees. On page 5 of the label you can find directions on how to use for conventional basal bark and stump applications.
For most herbicide applications including Crossbow Hebicide, you want to have no mowing for 2 full days prior to treatment and no mowing for 2 full days after treatment. This will allow the plants to readily absorb the chemical and not be stressed from mowing or reduce the plant surface that the product would be asborbed through.
Crossbow Herbicide is labeled to be used on Rangeland, Grass Pastures, Fence rows, roadsides and non-crop areas. It is not labeled to be used on St. Augustine grass. It will likely kill it. You can use Speedzone Southern for Dollarweed in St. Augustine grass. According to the product label of Speedzone Southern: The turf tolerance to this product may vary and temporary turf grass yellowing may occur on St Augustine. Do not apply Speedzone Southern to Floratam, Bitterblue or other improved species of St Augustine. Do not broadcast or spot spray St Augustine during the fall to winter transition or if temperatures are expected to fall below 40F within 10 days of the application.
To kill Hemlock trees you want to take hatchet or something like that and make chops into the trunk. Then you would apply the Crossbow undiluted by spraying or painting on the cuts.
The product label for Crossbow Herbicide does not address girdling specifically, so we would not be able to give you specific advice on this application. Per the treatment instructions for Conventional Basal Bark and Stump Applications: "...Mix 4 gallons of this product in diesel oil, No. 1 or No. 2 fuel oil, or kerosene to make 100 gallons of spray mixture. Spray the basal parts of brush or trees to a height of 15 to 20 inches from the ground...For better regrowth control, cut the larger trees and treat the stumps."
Crossbow Herbicide can stay in the soil up to a year after application. We would recommend that you wait before planting in that area or to plant elsewhere.
You will need to wait at least 1 year after applying Crossbow Herbicide before planting anything edible in that area.
While it is pet safe if used as directed, Crossbow Herbicide is not meant for use in a lawn. It is labeled for use on rangeland, grass pastures, fencerows, roadsides, and other non-crop areas.
We recommend the application of Crossbow Herbicide when the ground is not wet for at least 24 hrs following the initial application.
Crossbow Herbicide should not harm established trees but may damage young trees if applied directly to them. To avoid injury, do not apply directly on or within the drip line of smaller trees.
The amount of coverage area you will get out of a gallon of Crossbow Herbicide will be dependent upon the mix ratio you choose. You can get anywhere from 24 to 96 gallons of mixed solution out of the gallon. Mix ratio is 1 1/3 - 5 1/3 oz. of product per gallon of water.
Crossbow should not harm established trees but may damage younger trees if applied directly to them. To avoid injury, do not apply directly on or within the drip line of smaller trees.
Crossbow Herbicide could harm Liriope. There are not many options to table out ivy from Liriope aside from spot treating with Roundup.