Field horsetail is a stubborn weed that spreads quickly in the garden. You can combat it with soil amendment and a few tricks.
Horsetail prefers moist soil and waterlogging and also copes well with dense soil. Chemical sprays should be avoided as they are neither environmentally friendly nor particularly effective and cannot harm the deep roots. The same applies to home remedies such as vinegar or salt. Even covering the area with a film only brings short-term success. If you just can't get rid of the weeds, you can regularly remove the shoots of the horsetails, thereby depriving the plant of light. The plant is very resilient due to its meter-long roots that grow in all directions. Otherwise, the only solution is to dig up the roots, but this is a laborious job. For example, sowing lupins, whose roots penetrate deep into the ground, is a natural way to loosen the soil. The best times for this to take effect are spring and autumn.