Yes, Crossbow Herbicide is still being absorbed in the plant throughout that time period. We do normally recommend that you prune the plant before you apply Crossbow. It is recommended that you wait at least 30 days before pruning the plants once Crossbow has been applied. You can still cut the plant down after application.
Crossbow Herbicide could affect desirable woody and viney plants that are sprayed with it. You should avoid spraying desirable vines and trees. We suggest spot treating the target plants and spraying when conditions are calm.
Helena Crossbow Herbicide does not specifically list grape hyacinths. We recommend that you consult with your local cooperative extension office Master Gardener for tips on eradication.
Crossbow Herbicide can be used to kill dormant blackberry bushes and vines. You would apply to thoroughly wet upper and lower stems including the root collar and any ground sprouts. Treat at any time when the brush is dormant and the bark is dry. Best results have been obtained with late winter to early spring applications. You will use 1.5 gals./acre broadcast application or 1 to 1.5% mixture. Please refer to the product label for complete mixing and application instructions.
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 and avoid the foliage and any exposed roots of mature trees. It is best to carefully spot treat the target plants to avoid injury to your desirable trees.
Crossbow Herbicide is not labeled to be used around anything edible like vegetables. It is also a vegetation management product, which means that it is not very selective, so it will kill almost anything that it is sprayed on, including the edible plants. You will need to wait at least 3 weeks before replanting in areas areas where Crossbow Herbicide has been applied. You will need to wait at least 1 year after application to plant any edibles intended for human consumption. We would not recommended consuming anything from the current plants in the garden and disposing of anything contaminated by spraying.
Unfortunately, chameleon or Saururaceae, h. cordata, is an invasive species that is very aggressive and difficult to control. Because this plant spreads from underground rhizomes, you will not be able to control it by pulling or mowing. I have not been able to find any products that specifically list this plant on the label, and there is very little information from US sources on management of this plant. We would recommend trying RoundUp QuikPro, a non-selective herbicide with two active ingredients, or Southern Ag Brush Killer. These are excellent active ingredients that will damage most plants. You would want to give either product 10-14 days to see results. Be sure to give the plants enough time to die completely before tilling or disturbing the soil where they were growing.
Crossbow Herbicide can persist in the soil for up to 1 year You must wait one year after an application of Crossbow Herbicide to plant anything in the treated areas. Otherwise, you can remove and replace the soil with untreated soil. You will need to wait at least 3 weeks before replanting other plants in areas where Crossbow Herbicide has been applied. However, keep in mind that excessive amounts of this herbicide in the soil could inhibit seed germination and plant growth.
Yes, Crossbow Herbicide can be used to kill dormant blackberry bushes and vines. You would apply to thoroughly wet upper and lower stems including the root collar and any ground sprouts. Treat at any time when the brush is dormant and the bark is dry. Best results have been obtained with late winter to early spring applications. Do not treat when snow or water prevent spraying to the ground line. You will use 1.5 gals./acre broadcast application or 1 to 1.5% mixture. Please refer to the product label for complete mixing and application instructions.
