It’s very difficult to use if the horsetail is growing in the middle of your garden with plants you want to keep.Īnother way of preventing the plant from photosynthesising is to keep cutting it down at the stem whenever it starts to grow. And when you remove the tarp the plant will start to regrow.Ī drawback of this weed control method is that it’s only practical in areas where you don’t mind killing all the plants and starting again. Then leave it for at least two years to exhaust the plant.ġ2 months usually isn’t enough to kill horsetail weed. But it might not be possible if you have a large area to control.Ĭover the area and pin the black tarp down. One way to do this is to cover it in black tarp. If you can prevent it from seeing the sun you can control it and eventually cause it to die off. Like other plants, horsetail uses the process of photosynthesis to create energy for it’s growth and spread. So be prepared for a long process that can take 5 years or more to completely eradicate the weed. You need to give it a year to see the improvements.Īnd you might still find the occasional horsetail plant growing. Mixing in some compost can also help to prepare the soil for your plants to grow.Īlthough changing the soil conditions will encourage horsetail to disappear naturally, don’t expect it to happen over night. Wait 2 weeks after adding the lime before you add fertilizer to the soil. This increases the pH of the soil away from the acidic conditions that horsetail prefers.īut horsetail can still grow in alkaline conditions, so this won’t be enough on its own. Apply Dolomite LimeĪdd the lime to the soil as per the instructions on the packet. If the drainage problems are severe enough this may involve laying a drainpipe or digging a perimeter ditch to siphon away the water. And make sure that heavy rain drains easily from the area. Improve Drainageįill in any depressed and boggy areas that are holding water. So the best way to control it in the long term is simple:Ĭhange the soil conditions away from the ones it prefers to something more suitable for the healthy growth of desirable plants. Horsetail thrives in wet soil that’s low in oxygen, nutrients, and pH (acidic). Making it difficult to spray on grass lawns or around desirable plants. So it will kill any plants it comes into contact with. And if applied regularly over a long enough period it can cause it to die.Īs useful as it is, using vinegar has a drawback: However, destroying the growth above ground with repeated applications can weaken the plant. This means it can destroy the parts of the plant it touches. Similar to chemical weedkiller, your results will be better if you first damage the plant by cutting the stems or crushing the leaves. Instead, you need to get high-strength vinegar with an acetic acid concentration of around 20-30%. But the normal table variety isn’t strong enough to do the job. Vinegar is good at killing horsetail above the ground. But it will prevent the growth of new shoots. It won’t kill the horsetail plants that are already growing. Using A Pre-Emergent HerbicideĪ good way to control the growth of horsetail is to use the pre-emergent herbicide Casoron. Don’t dispose of them in landfill, by dumping them in the countryside, or by adding them to your compost pile. Burn them or allow them to rot in a bin liner. Make sure you dispose of any parts you cut away carefully. But it may take a number of tries before you kill the plant roots as well, preventing it from regrowing. This approach is very effective at killing horsetail above the ground, and you’ll notice results after your first application. Then spray or paint the weed killer on to the damaged areas so it can get inside the plant. To use weed killer effectively, you first need to cut the weeds back or crush the stems and leaves. Southern Ag Crossbow Specialty Herbicide On Amazon So the best weed killer for horsetail is Crossbow. But a better choice are products containing the herbicides 2,4-D and triclopyr. Weed killers containing glyphosate can do the job, such as RoundUp. This kills the horsetail from the inside all the way down to the root. To get the best results you should use a post-emergent systemic weed killer. But if you use them in the right way it’s possible to control the plant.Ĭhoosing the right product is crucial. Horsetail ( Equisetum arvense) has a hard waxy cuticle that makes it difficult to kill with herbicides. Is it Horsetail or Marestail? 8 ways To Kill Horsetail Weeds Chemical Weed Killer
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