Eriogonum Umbellatum Seeds – 100 Sulphur Flower Wild Buckwheat Yellow Perennial

Eriogonum umbellatum, commonly known as Sulphur Flower or Sulphur Buckwheat, is a low-growing native perennial prized for its cheerful yellow blooms and exceptional drought tolerance. This western North American wildflower forms neat mounds of gray-green foliage that serve as an attractive ground cover in rock gardens, xeriscapes, and native plant landscapes. In late spring and summer, clusters of tiny sulphur-yellow flowers rise above the foliage, creating a bright display that attracts bees, butterflies, and other pollinators.

Sulphur Flower is an excellent choice for water-wise gardens, pollinator habitats, and erosion control on dry slopes. Its compact habit and long-lasting blooms make it a standout in borders, containers, and wildflower meadows. As a native species, it supports local ecosystems and requires minimal maintenance once established.

Plant Features

• Bright sulphur-yellow flower clusters in late spring to summer
• Low-growing, mounding habit with attractive gray-green foliage
• Highly drought tolerant and deer resistant
• Attracts bees, butterflies, and other pollinators
• Native to western North America, ideal for xeriscaping

Growing Information

• Botanical Name: Eriogonum umbellatum
• Plant Type: Perennial
• Sunlight: Full sun
• Soil: Well-drained, sandy or rocky soil
• Water Requirements: Low; drought tolerant once established
• Growth Habit: Low mounding
• USDA Hardiness Zones: 4-9
• Bloom Season: Late spring to summer
• Mature Height: 6-12 inches
• Germination Requirements: Cold stratification recommended; surface sow and keep moist
• Spacing: 12-18 inches apart

Planting & Care

Sow seeds indoors or directly in the garden. For best results, cold stratify seeds for 4-6 weeks before sowing. Surface sow and lightly press into the soil, as light aids germination. Keep soil consistently moist until seedlings emerge, then reduce watering. Transplant seedlings after the last frost, spacing them 12-18 inches apart in a sunny location with well-drained soil.

Once established, Sulphur Flower requires little care. Water sparingly, allowing soil to dry between waterings. Avoid overwatering or rich soils, which can cause root rot. Deadhead spent blooms to encourage reblooming and maintain a tidy appearance. In colder zones, provide a layer of gravel mulch for winter protection.

What's Included

100 Eriogonum umbellatum seeds.