Petasites spurius

False butterbur occurs in habitats like forest understories and rocky areas, where it grows under natural shade. It prefers partial sun but can tolerate both full sun and full shade, reflecting its versatile and hardy nature.

False butterbur can tolerate a wide range of temperatures, though its distribution may still be restricted by specific combinations of moisture and heat. It does best in warm summer conditions with sufficient rainfall or watering. Extended periods of cloudy, rainy weather, as well as prolonged high temperatures, increase the risk of False butterbur dying. In winter, shielding it from cold improves the plant's chances of survival.

One fertilizer application in spring is generally enough for False butterbur, although several feedings can maximize growth. Apply fertilizer every month to six weeks. Fertilizing improves the leaves' appearance and function, helping maintain consistent color and a healthy texture. It also encourages root development and nutrient uptake, supporting the plant's long-term health.

False butterbur is known for its large, broad leaves and rapid growth. To encourage new growth, it is best to prune the plant from early to late spring. Regularly remove dead leaves and thin the plant to improve air circulation. This helps promote healthy foliage and ensures vigorous growth while maintaining the plant's size and shape.