Eliminate thistle from lawn and garden. Typically, this means 1 or 2 sprays per plant. There are not many natural herbicides for thistles. Canada thistle grows naturally throughout most of Canada … Glyphosate 4 or 2 4-D Amine are ideal herbicides for fighting thistle plants, as they are systematic and will kill the plant down to the root. Organic Canada Thistle Control. This kills the plant because pH affects a plant’s ability to absorb nutrients from the soil and Canadian thistle is all about roots (more on that later). september to october (rosette growth and shoot emergence) — Treat using a herbicide containing clopyralid, aminopyralid or … It is difficult to control because its extensive root system allows it to recover from control attempts. ... Horticultural vinegar (30%) provides effective, fast-acting, organic treatment. Find the base of the Canada thistle plant and simply snip it off at the base. Go to battle and kill thistle for good. It is best to use herbicide in fall and then follow up in spring, as these are the times Canada thistle is most vulnerable. Both apple and white vinegar destroyed my Canadian thistle infestation in every location I applied them so far. Controlling Canada thistle organically is done with a sharp eye and an even sharper pair of scissors. Grazing Canada thistle with goats is a control option because goats tolerate and often prefer spiny, tough fodder that other livestock reject. Canada thistle can displace endangered or threatened plant species. Use a sponge to apply, or cut thistle plants and then use an eye-dropper to put a drop or two into the stem. Combining control methods is the best form of Canada thistle management. Then, spritz the vinegar directly onto the thistle plants until the plants are dripping with vinegar. It is adapted to a wide range of soil conditions, and spreads vigorously by wind-borne seeds and by way of its extensive, creeping root system. Not Your Average Thistle In pastures, Canada thistle is a deterrent to grazing because cattle avoid eating the spiny leaves. Some people have reported success with pouring scalding water on thistles or spraying them with straight vinegar. Be aware, however, that this caustic acid should be used with care, like any other spray. It is appropriate for spot-spraying individual plants, not entire areas. Pour household white vinegar into a spray bottle. It should burn all the greenery. Canada thistle prior to lowering with a rotary mower set at the highest height. Do not pull Canada thistle out, as this can split the root, which causes two Canada thistles to grow back. Expect the vinegar to take a few days to a week to kill the thistles. All necessary for Pest Control https://amzn.to/2rLU5CG How to Kill Canadian Thistle Using Salt or Vinegar. 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