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Hyssop Purple Giant

Agastache rugosa

Hyssop Purple Giant (Agastache rugosa) is a striking perennial herb known for its tall spikes of purple flower clusters and aromatic, mint-scented leaves. Blooming from midsummer to early fall, it attracts a variety of pollinators, including bees, butterflies, and hummingbirds. This hardy plant thrives in full sun and well-drained soil, tolerating heat and drought once established. Its vibrant blooms and fragrant foliage make it an excellent addition to borders, herb gardens, and pollinator-friendly landscapes.

$3.25

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Plant Data
Growing Instructions
Plant Data
Zones:  5, 6, 7, 8, 9
Growth Cycle:  Perennial, Self Seeding Perennial
Light:  Full Sun, Full Sun to Partial Shade
Water Needs:  Low, Low to Moderate, Moderate
Color: 
Soil:  Tolerant of most soils, Chalky, Saline, Peaty, Sandy, Loam, Silty, Clay
Growth Rate:  Fast to Moderate, Moderate
Maturity - (Vegetables Only): 
Edible:  Yes.
Height:  Up to 4 Feet
Evergreen:  No
Special Features:  Attracts Pollinators, Flowering, Fragrant, Medicinal, Fodder and Wildlife , Drought Tolerant, Dried Flowers,Cold Hardy,Self Seeding
Warnings:  Uknown - Let us Know
Growing Instructions
How to Germinate Hyssop Purple Giant

How to Germinate Hyssop Purple Giant (Agastache rugosa)

  • Sow Hyssop Purple Giant seeds indoors 6-8 weeks before the last expected frost date or directly outdoors in spring after the danger of frost has passed.
  • Sprinkle seeds on the soil surface and press them down lightly; do not cover, as they need light for germination.
  • Use well-draining soil and maintain a temperature of 65-70°F (18-21°C) for optimal germination, which typically takes 14-21 days.
  • Water lightly to keep the soil moist but not waterlogged during the germination period.
  • Once seedlings have 2-3 sets of true leaves, transplant them outdoors, spacing them 12-18 inches apart.
  • If sowing directly outdoors, thin seedlings to the same spacing once they are a few inches tall.

Additional Tips

  • Hyssop Purple Giant prefers full sun but can tolerate partial shade, thriving in well-draining soil enriched with organic matter.
  • Water regularly, especially during dry spells, but allow the soil to dry slightly between waterings to avoid overwatering.
  • Apply mulch around the plants to retain moisture, control weeds, and regulate soil temperature.
  • Deadhead spent flowers to encourage continuous blooming and maintain a neat appearance.
  • This plant attracts bees, butterflies, and hummingbirds, making it an excellent choice for pollinator gardens.
Hyssop Purple Giant

Hyssop Purple Giant

$3.25