Posted: 28/04/2015 at 12:21
Horsetail is a very persistent perennial and as its roots go down metres under the soil surface it is almost impossible to eradicate. Even the smallest piece broken off the main plant can regenerate. You can use a systemic weed killer making sure you crush the stems so that the weed killer is absorbed but if the horsetail is growing in a lawn or flower bed this is not an option. Regular mowing of grass weakens it. I have lived in my house for 33 years and I have still not got rid of it. I do weed it out the minute I see it and on my drive I use the weed killer I mentioned above but I have resigned myself to living with it
I believe that if you completely cover the ground with a weed resistant membrane and leave it for several years so light is excluded it will eventually give up the ghost but which gardener can do that!