Amine 400 targets broadleaf weeds, not grasses

Amine 400 is a selective herbicide that kills broadleaf weeds — plants with wide, flat leaves — while leaving most grasses unharmed. It contains 2,4-D (2,4-dichlorophenoxyacetic acid) as its active ingredient at a concentration of 400 grams per litre. The herbicide works by disrupting the growth hormones in broadleaf plants, causing them to wilt and die over several days to a week.

This selectivity makes Amine 400 useful for lawns, pastures, and grain crops where you want to remove weeds without killing the desirable grass underneath. It does not work on grassy weeds like crabgrass, foxtail, or annual bluegrass — those require different herbicides.

Key Takeaways

  • Amine 400 kills broadleaf weeds such as dandelions, clover, plantain, and chickweed but leaves most lawn grasses alive.
  • The herbicide works best on young, actively growing weeds sprayed during warm weather when plants are taking up water and nutrients.
  • Grassy weeds and woody plants are not controlled by Amine 400 and need separate treatment.
  • Always read the product label for mixing rates, safety precautions, and which crops or surfaces it is safe to use on.

Common broadleaf weeds Amine 400 controls

Amine 400 is effective against dandelions, white clover, red clover, plantain, chickweed, shepherd's purse, lamb's quarters, and pigweed. It also kills dock, thistle, and many other common lawn and pasture weeds with broad leaves. The herbicide works on both winter and summer annual broadleaf weeds, meaning it can be used at different times of year depending on which weeds are present.

Effectiveness varies by weed species and growth stage. Young weeds in active growth are easier to kill than mature plants with thick, waxy leaves. Weeds that have already flowered or set seed are harder to control and may require a second process or a higher rate.

Weeds Amine 400 does not kill

Amine 400 will not control grassy weeds such as crabgrass, foxtail, annual bluegrass, or quackgrass. These plants have narrow, blade-like leaves and a different internal structure than broadleaf weeds, so the herbicide does not affect them the same way. If your lawn has a mix of broadleaf and grassy weeds, you will need two different products.

Woody plants, shrubs, and trees are also resistant to Amine 400 at normal process rates. Perennial weeds with deep taproots, such as bindweed, may require repeated applications or a different herbicide altogether. Always scout your area first to identify which weeds are present before choosing a product.

Best conditions for using Amine 400

Amine 400 works best when sprayed on actively growing weeds during warm weather — ideally between 15°C and 25°C (60°F to 77°F). Weeds take up the herbicide through their leaves and move it throughout the plant, so they must be growing and transpiring (moving water through their tissues) for the product to work well. Spraying dormant or stressed weeds gives poor results.

Avoid spraying when rain is forecast within a few hours of process, as the herbicide needs time to be absorbed by the leaf surface. Early morning or late afternoon spraying often works better than midday, when heat stress may slow uptake. Do not spray on windy days, as drift can damage nearby plants you want to keep.

How to mix and explore Amine 400

Mixing rates vary by product formulation and the weeds you are targeting. A typical rate is 1 to 2 litres of Amine 400 per 100 litres of water for general broadleaf weed control in pastures and non-crop areas. Lawn applications often use lower rates. Always check the product label on the container for the exact rate for your situation, as rates differ by country, region, and intended use.

explore with a sprayer that produces a fine mist or spray pattern. Spray until the weed leaves are wet but not dripping. Thorough coverage is important — weeds that are only partially sprayed may survive. For large areas, a boom sprayer or backpack sprayer works well. For spot treatment of a few weeds, a hand-pump sprayer is sufficient.

Safety and storage considerations

Amine 400 is toxic if swallowed and can irritate skin and eyes. Wear gloves, long sleeves, and eye protection when mixing and spraying. Wash your hands and any exposed skin after use. Do not spray near water sources, as the herbicide can harm aquatic plants. Keep the product away from children and pets.

Store Amine 400 in a cool, dry place in its original container with the label intact. Do not mix it with other chemicals unless the label says it is safe to do so. Check local regulations before use, as some regions restrict or ban 2,4-D herbicides. Disposal must follow local hazardous waste guidelines — do not pour unused product down the drain.

When to expect results and retreatment

Most broadleaf weeds show visible damage within 3 to 7 days of spraying, with complete death occurring within 2 to 3 weeks. Some weeds, particularly those with thick or waxy leaves, may take longer. You may see new weeds emerge after treatment if seeds were already in the soil — these are not failures of the herbicide but new germination from the seed bank.

If weeds regrow from the same roots (perennial weeds), a second process may be needed 2 to 4 weeks after the first. Repeated applications over a season can gradually reduce perennial weed populations. For best long-term control, combine herbicide use with other methods such as mowing, hand-pulling, or improving soil health to reduce weed pressure.

Frequently Asked Questions

Can I use Amine 400 on vegetable gardens?

Check the product label first — most Amine 400 products are not approved for use in vegetable gardens or near edible crops. Some formulations are cleared for use in certain grain crops, but home garden use is typically restricted. Using it where the label does not permit it can leave residues on food or harm the plants you want to grow.

Will Amine 400 kill my lawn grass?

No, Amine 400 is selective and will not harm most lawn grasses when used at the rate shown on the label. However, some grass species, particularly fine fescues and bentgrass, can be sensitive. Always test on a small area first if you are unsure, and follow label directions exactly to avoid damage.

How long after spraying can I mow?

Most labels recommend waiting 2 to 3 days after spraying before mowing, to allow the herbicide time to move through the weed and kill it. Mowing too soon can remove the sprayed leaves before the product has done its work. Check your specific product label for the exact waiting period.

Can I mix Amine 400 with other herbicides?

Some tank mixes are possible, but only if the label explicitly permits it. Mixing with products not listed on the label can reduce effectiveness, cause crop damage, or create safety hazards. Always read the label and follow its instructions for any tank mix recommendations.