How do you kill Equisetum or otherwise known as horsetail?
Repeated burning or cutting of horsetail forces its continued growth, eventually exhausting its carbohydrate stores. This process can take years for well-established equisetum stands. Equisetum thrives in wet, acidic, sunny locations. Therefore, applying lime, improving drainage, and applying fertilizer to accelerate the growth of grasses in mixed stands serves as a cultural control. Equisetum does not respond significantly to additional nitrogen, giving grasses an advantage.