Yes, you can use Tenacity Herbicide at the same time as a fertilizer such as humic acid either as a pre or a post emergent provided you use both at the correct usage rates per the labels.
It is safe to mow areas that have been treated with Tenacity Herbicide 2 days after application. After that time the product would have worked into the plant enough to not be affected by mowing. Delaying mowing does not help it work better.
The product label states that Tenacity acts as a pre and post emergent on bentgrass so it should help prevent it for at least a few months if applied at the right time. As a post emergent, you would apply it as you start to see new signs of bentgrass growth at two to three week intervals for up to three applications. Twice a year would not be enough for a post emergent control but can help to prevent it. Bentgrass control may be more effective in the late summer/early fall just prior to onset of renewed bentgrass growth, rather than spring/early summer applications.
You do not need to water after a post emergent application of Tenacity.
Tenacity Herbicide is not labeled to prevent or eradicate lespedeza.
Tenacity Herbicide should be applied when temperatures are between 65 and 85 degrees and when there is no rain in the forecast for 24 hours. If your temperatures reach above 85 degrees during the day, apply in the morning or evening when it is cooler.
Tenacity Herbicide is not labeled for zoysiagrass.
No, Tenacity Herbicide cannot be used on residential St Augustine lawns. It is only for use on St Augustine grown for sod as listed on the product label.
No, you should not use Tenacity Herbicide on or around desirable ornamental plants or groundcovers, such as liriope. Please let us know what weeds you are targeting so that we can recommend an alternative product for you.
If you have multiple sprayers, then the best thing for you to do is to calibrate your equipment using just water over a small area. For example, you can mark off an area that is 1000 sq ft (20 x 50 feet), fill your tank with 1-2 gallons of water, and then walk at your normal pace and see how much water you used to cover that area. It is most important that you use the correct amount of herbicide for the size area you are treating and think of the water as the carrier, rather than insisting on a specific amount of product per gallon of water. If you take this time to calibrate your sprayer once, then you will know how much water you use for the area going forward. Using a spray indicator dye is also a great tool so that you apply herbicides evenly over your yard.
Tenacity Herbicide should be used just before the soil temperatures reach 55 degrees in early and late fall. Please contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region.
Some folks do use food coloring/dye to mark where Tenacity Herbicide has been applied. How much you use depends on the depth of color you want. We apologize but cannot advise on the exact amount.
When using Tenacity Herbicide as a post emergent, it should not be watered in. It should be applied when there is no rain in the forecast for 24 hours after application.
Tenacity Herbicide reapplication times can vary depending on the target weed and application. Please refer to the product label for complete information.
You can view the full list of weeds controlled by Tenacity Herbicide on page 3 of the product label here. There are separate colums for pre-emergent and post-emergent control.
Yes, chelated iron can be used after using Tenacity Herbicide
You can find a full list of weeds Tenacity Herbicide targets here: Tenacity Product Label. There should not be any issues using Tenacity Herbicide and Sedgehammer Herbicide at the same time as long as the turf is established and not under other significant stress. Tenacity Herbicide states the following in reference to tank mixing. We always recommend doing a small tank mix test before application.
"Tenacity has been tested in tank mixtures with Barricade 65WG Herbicide (prodiamine), Vanquish® (dicamba), Turflon® ester (riclopyr), Spotlight™ (fluroxypyr), Quicksilver™ (carfentrazone), Basagran® (bentazon), Princep® (simazine), and AAtrex® (atrazine) for safety and efficacy on turfgrasses. Tenacity must be applied at reduced rates (4 fl. oz./A or less) if tank mixed with atrazine, bentazon or simazine. Other tank mixture partners may be safe but have not been tested. Turf managers wanting to tank mix Tenacity with other herbicides should test on a small basis for compatibility, safety and efficacy before treating large areas. See product labels for directions and precautions"
No, Tenacity Herbicide is not labeled for application to bahia.
We do always recommend that only mix the amount of Tenacity Herbicide you can use at a time. To dispose of any remaining you would not pour down any drain, but can use to go over some of the areas you were treating or you can pour into the dirt right next to the foundation of the home to prevent any run off to the nearby creek.
Tenacity Herbicide should not be used within 3 feet of desirable trees or ornamentals. If treating actively growing grassy weeds, Fertilome Over The Top II Grass Killer can be used. The manufacturer recommends that you use caution during application because the spray can cause damage if it comes into direct contact with foliage.
