Equisetum × ferrissii

Ferriss's horsetail occurs naturally in habitats like forest understories or rocky sites, where it grows in natural shade. It prefers partial sun but can tolerate full sun or full shade, demonstrating its versatility and hardiness.

Ferriss's horsetail can tolerate a broad range of temperatures, but its range may still be restricted by various combinations of moisture and heat. It does best in warm summer climates with sufficient rainfall or watering. Long stretches of cloudy, rainy weather or extended high temperatures can raise the chance of Ferriss's horsetail dying. In winter, protecting it from cold can increase its survival rate.

Typically, a single fertilizer application in spring is enough for Ferriss's horsetail, though multiple feedings can boost growth. Apply fertilizer every month to a month and a half. Fertilization improves leaf appearance and function, encouraging uniform color and a healthy texture. It also encourages root development and nutrient uptake, supporting the plant's long-term health.