N
The Daily Insight

How long does trimec need before rain

Author

Emily Carr

Updated on May 07, 2026

Apply Trimec at least 24 hours before rain or lawn watering. This allows time for the herbicide to dry and fully infiltrate the plant system. Trimec is a powerful herbicide that should be used no more than 2 times per year, with at least 30 days between applications.

How long does trimec take to dry?

Depends on the weather conditions. The product takes longer to dry on a cool, cloudy day than on a warm, sunny day. Usually within 4–6 hours.

What temperature should I spray trimec?

Answer: When using Trimec 992 Broadleaf Herbicide the tempuratures would need to be above freezing, and the weeds would need to be actively growing in order for the product to work effectively. Most post-emergent herbicides such as Trimec will be most effective when temperatures are around 65-80 degrees.

How long does trimec take to work?

Answer: Depending on the age of the plant and the health of the plant it can take 2-4 weeks to see results after using Trimec 992 Broadleaf Herbicide. 11 of 11 people found this answer helpful.

How long should I wait to mow after spraying trimec?

Answer: It is recommended to mow 3 days before Gordons Trimec Classic Broadleaf Herbicide application and then you can mow 3 days after application.

Can you mix tenacity with trimec?

Answer: Yes, Gordons Trimec Classic Broadleaf Herbicide and Tenacity Herbicide can be mixed. It is always recommended to do a small tank mixture to ensure there is no clumping between the two products, and that you always follow the more restrictive label when using multiple products at the same time.

How fast does trimec southern work?

Trimec Southern Broadleaf Herbicide begins working immediately and you should start to see symptoms of damage within a day. It may take 1 to 2 weeks for the target weed to fully die.

When should I spray Trimec?

Apply Trimec in the spring or early summer if you seed with cool-season grasses. These seeds prefer cool, early fall temperatures between 60 and 75 degrees Fahrenheit for germination. Avoid any seeding in late fall, however, because germination rates are considerably reduced.

How long after Trimec can I water?

We recommend that you apply the Gordons Trimec Classic Broadleaf Herbicide on a day when you are not expecting any rainfall. You should not irrigate 24 hours after application of the product also per the product label instructions.

Will Trimec hurt trees?

Some of these go into the ground with water and the trees and shrubs will take them in through their roots. These sprays can be very injurious to trees and shrubs. … Neither should Trimec or Weed B Gon Max be used within the rooting zone of trees.

Article first time published on

Can I spray trimec in the fall?

Answer: Trimec 992 Broadleaf Herbicide can be sprayed when weeds are actively growing through October before the soil temperatures reach 55 degrees Fahrenheit. Please check out our Cool Season Lawn Schedule for a wonderful guide that shows when to treat your lawn.

Can I use trimec on new grass?

After you have put down new seed, you should wait until after the second mowing to new seedlings to use Trimec 992. 31 of 42 people found this answer helpful.

Is it better to spray weeds before mowing?

Do not apply a weed killer right after mowing. … Wait at least 2 days after applying a weed killer before mowing. This gives the weed a chance to grow after mowing and to have good foliage for the weed killer to work on.

How much is trimec a gallon of water?

By combining three broadleaf actives, Trimec is able to handle most any unwanted weed growth excluding only grassy types. WHERE TO USE IT: Fields, fence rows, lawns and just about any where unwanted broadleaf weed growth is active. RATE OF APPLICATION: Use 1 to 1.5 oz per gallon of water per 1000 sq/ft of turf.

Is trimec volatile?

Controls dandelions, chickweed, knotweed, clover, plantain, henbit, spurge, kudzu, and many other broadleaf weeds in turf and lawns. This is the Trimec® complex for cool weather control of hardened-off mature weeds. The low volatile ester formulation penetrates even the toughest weeds.

Is trimec the same as 2 4d?

Trimec does contain 2,4-d.

What is the mix ratio for Trimec?

Gordons Trimec Classic Broadleaf Herbicide is mixed anywhere from 0.75 – 1.5 oz. per 0.5 to 6 gallons of water per 1,000 sq ft. depending on what and where you are treating.

Can Trimec be used on zoysia?

Answer: Yes, Trimec 992 Broadleaf Herbicide is safe to use on a Zoysia lawn, and it is labeled for ground ivy (creeping charlie). It will also treat a variety of other broadleaf weeds as well. Please see the product label for a full list.

Is Trimec effective?

Most post-emergent herbicides such as Trimec will be most effective when temperatures are around 65-80 degrees. … Most post-emergent herbicides such as Trimec will be most effective when temperatures are around 65-80 degrees.

Can I mix 2 4-D and tenacity?

Re: Can I mix Tenacity (mesotrione), 2,4-d and triclopyr? Tenacity and Triclopyr, yes.

Can I mix tenacity and TZone?

TZone SE Herbicide does not require the use of a surfactant and doing so may damage the leaf tissue of turfgrass. Per the product label: If any discoloration or cosmetic effects are objectionable or would be unacceptable, then adjuvants combined with this product would not be recommended.

Can you mix dicamba and triclopyr?

Re: 2,4-D mixed with Triclopyr If you are careful, it is fine, but the combination is much more dose sensitive than either one individually so careless spraying can result in phytotoxicity.

Will trimec hurt dogs?

Trimec 992 Broadleaf Herbicide is pet safe when used as directed. Pets and people need to be kept away from the treated area during application and until everything is fully dry. Once everything is dry, it is fine to resume normal activity. If pets chew on the grass, it won’t harm them once dry.

How often can I use trimec?

How soon to re-apply? Wait a minimum of 30 days between applications. The maximum number of broadcast applications is limited to 2 times per year.

Is trimec a pre emergent?

Answer: No, Gordons Trimec Classic Broadleaf Herbicide is a post-emergent product. This will only kill what is already emerged out of the ground.

Does trimec need a surfactant?

Answer: A surfactant is not required when using Gordons Trimec Classic Broadleaf Herbicide. However, you can use one in order to increase the effectiveness of the product and help it adhere to plants more effectively.

How long does it take for Gordon's brush killer to work?

How does it work? Brush Killer for Large Property enters the plant through leaves, woody stems, and cut surfaces, and then moves through the vascular system of the plant. Visual symptoms usually appear in 1-3 weeks.

Is trimec safe for fescue?

Gordons Trimec Classic Broadleaf Herbicide will not harm Fescue when applied per label. Trimec 992 is used at 3 – 4 pints per Acre (1. … Trimec 992 Broadleaf Herbicide will not harm Fescue when applied per the label instructions. Gordons Trimec Classic Broadleaf Herbicide will not harm Fescue when applied per label.

Is trimec classic safe for grass?

Proven post-emergent broadleaf herbicide The synergistic action of its formulation helps keep the cost-per-acre low, and Trimec Classic won’t harm most turfgrass species when used as directed.

Is trimec organic?

The main active ingredient in Trimec Plus is monosodium acid methanearsonate, or MSMA. This organic arsenical compound comprises 18 percent of the active ingredients. It works by destroying the chlorophyll in plants like crabgrass, nut sedge, dallisgrass and pigweed.

Can trimec freeze?

Answer: If you are certain the Trimec 992 Broadleaf Herbicide froze, you may not get the results you are seeking so you will want to get a new bottle. It should not be frozen and it should be kept away from extreme heat as well for the most effective results.