Bright Yellow Blooms

Our Silphium flowers to plant outside produces vibrant yellow blooms that brighten any garden. Our large, daisy-like flowers not only add beauty but attract pollinators like bees and butterflies, making our seeds for planting flowers a great addition to your landscape for color and natural benefits.

Edible Roots and Leaves

The Silphium seeds for flowers offers more than just beauty as its roots and leaves are edible! Historically used for traditional and culinary purposes, our flower seeds to plant outside provide a unique addition to gardens, allowing you to enjoy both their stunning appearance and edible parts.

Pollinator Friendly Choice

Our pollinator seed mix produces bright yellow flowers that attract bees, butterflies, and hummingbirds, making it an outstanding choice of perennial flower seeds for supporting local wildlife and pollination. Great for pollinator garden landscapes.

Tall Growth Habit

With an impressive height of 40-90 inches, our Silphium flower seed adds vertical interest to your garden. Its towering structure provides an elegant backdrop, making it an ideal choice for large gardens or as a stunning focal point in perennial beds, offering both beauty and support for wildlife.

Silphium (Silphium Perfoliatum) - This towering, flowering plant is a native of the tall grass prairie and readily establishes from Silphium seeds. It is commonly known as Cup Plant and is a perennial giant which has yellow daisy-like flowers. The flowers measure 3 - 4 inches across and attract bees and birds. The name comes from the large leaves that are on opposite sides of the stem and are fused together at their base. This base forms a cup that collects water from the morning dew. Birds and insects seek out the collected water.

The Silphium Cup Plant prefers sunny settings and moist loamy soil. The root system consists of a long central tap root and many shallow rhizomes. The rhizomes help to spread the plant. The Silphium Perfoliatum Cup Plant will often form substantial colonies due to the spreading ability.

How To Grow Silphium: Sow Silphium Perfoliatum seeds directly outdoors in late fall or early winter. These particular flower seeds do well with a cold, dormant planting as the cold temperatures actually help break the flower seed of its dormancy. Once spring arrives and temperatures warm, the Cup Plant seeds will germinate quickly. Prepare the outdoor soil by removing weeds and loosening. Silphium Cup Plant seed can be raked into loosened soil and covered 1/8 - 1/4 inch.

Approximately 2,000 seeds per ounce.