Cup Plant

Perfoliate Silph ( Silphium perfoliatum ) from Northern Wildflowers, a perennial plant for natural gardens and dining spaces

THE Cup Plant ( Silphium perfoliatum ) from Northern Wildflowers is an imposing perennial, ideal for adding height and colour to natural gardens, as well as dining areas. This hardy plant produces large yellow flowers that bloom from July to September, attracting many pollinators including bees and butterflies. Adapted to a wide range of soils, from dry to wetter sites, it is perfect for meadows and riversides.

Spread : 30 to 45 cm
Plant height : 3 to 6 feet (approximately 0.9 to 1.8 meters)
Quantity per pack : Approximately 20 seeds
Companion plants : Echinacea, rudbeckia, monarda
Enemy plants : None known
Hardiness zones : 4 to 8

Cultivation method:

Cup Plant prefers well-drained soils and can tolerate a range of moisture, making it suitable for dry to moderately moist sites. It enjoys full sun to partial shade. This plant can be sown directly outdoors after the last frost or started indoors before. For best growth, space plants 12 to 18 inches apart. Its summer bloom attracts a wide variety of pollinators and provides a great sight in natural or restored landscapes.

THE Cup Plant is an excellent option for meadow gardens, river banks and other ecological spaces. It provides both beauty and support for local wildlife while blending perfectly into a natural environment.