Giant Yellow Hyssop (Agastache nepetoides) - Herb Flower Seeds

Giant Yellow Hyssop (Agastache nepetoides) is a tall, perennial herbaceous plant valued for its aromatic foliage and vibrant yellow flowers. This hardy herb attracts bees, butterflies, and hummingbirds, making it perfect for pollinator gardens, borders, and naturalized landscapes.

These Non-GMO Giant Yellow Hyssop Seeds thrive in full sun with well-drained soil. Once established, the plants are low-maintenance, drought-tolerant, and provide a long season of bright blooms. The aromatic leaves can also be used for herbal teas and culinary purposes.

Features

• Aromatic perennial herb with bright yellow flowers
• Non-GMO seed quality
• Attracts pollinators such as bees, butterflies, and hummingbirds
• Thrives in full sun and well-drained soil
• Low-maintenance, drought-tolerant perennial
• Ideal for herb gardens, borders, and naturalized plantings
• Tall, upright growth habit
• Long blooming season

Specifications

• Botanical Name: Agastache nepetoides
• Common Name: Giant Yellow Hyssop
• Seed Type: Non-GMO
• Plant Type: Perennial herb
• USDA Zones: 4–8
• Sun Exposure: Full sun
• Soil Type: Well-drained, sandy or loamy soil
• Water Needs: Low to moderate; drought-tolerant once established
• Height: 3–5 feet
• Spacing: 18–24 inches
• Bloom Time: Summer
• Flower Color: Yellow
• Season for Planting: Spring or early summer
• Germination Time: 14–28 days
• Germination Temperature: 65–75°F
• Sowing Method: Surface sow; lightly cover seeds
• Growth Habit: Upright, clump-forming
• Maintenance Level: Low
• Uses: Herb gardens, borders, pollinator-friendly plantings, culinary uses

Planting Guide

• Soil Preparation: Use well-draining soil; amend with compost if needed.
• Sowing Time: Direct sow outdoors in spring after frost or start indoors 6–8 weeks early.
• Seed Depth: Lightly cover seeds with 1/8 inch soil.
• Watering for Germination: Keep soil evenly moist until seedlings emerge.
• Germination Window: 14–28 days depending on temperature.
• Light Requirements: Full sun for best growth and flowering.
• Thinning: Space seedlings 18–24 inches apart.
• Watering After Establishment: Low to moderate; drought-tolerant once mature.
• Maintenance Tips: Remove spent flowers to encourage prolonged blooming.
• Seasonal Care: Hardy perennial; minimal maintenance required.