Anise Hyssop Plant Care
Agastache foeniculum (Pursh) Kuntze
Agastache foeniculum, commonly called anise hyssop, blue giant hyssop, Fragrant giant hyssop, or the lavender giant hyssop, is a species of perennial plant in the mint family. The plant is native to much of northern North America.
Every 7–10 days
Full sun to partial shade
50–85°F
40–60%
What Is the Anise Hyssop?
Anise Hyssop (Agastache foeniculum) belongs to the Lamiaceae family within the Agastache genus. Anise Hyssop is native to much of northern North America. Anise Hyssop is also known as Blue Giant Hyssop, Giant Hyssop, Fennel Hyssop.
Anise Hyssop displays an upright, bushy perennial growth habit, reaching up to 2 inches tall with a spread of approximately 1.5 inches. Anise Hyssop produces spiky clusters of tubular flowers in shades of purple, pink, or blue.
Leaf size: approximately 4 inches.
How Often Should You Water a Anise Hyssop?
Agastache foeniculum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Anise Hyssop Need?
Anise Hyssop thrives in full sun to partial shade light conditions. The optimal light range is 2000–4000 lux. Avoid placing Anise Hyssop in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun to partial shade
2000–4000 lux
What Temperature and Humidity Does the Anise Hyssop Prefer?
Agastache foeniculum grows best at temperatures between 50°F and 85°F. Anise Hyssop prefers humidity levels of 40–60%.
Temperature
50–85°F
Humidity
40–60%
What Soil Mix Works Best for a Anise Hyssop?
Well-draining sandy loam with added compost for nutrients. Good drainage is essential for Anise Hyssop to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Anise Hyssop?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Anise Hyssop?
Anise Hyssop can be propagated through seeds, stem cuttings.
Fertilizing
Every 6 months
During the growing season
Is the Anise Hyssop Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the Anise Hyssop?
Anise Hyssop is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Anise Hyssop Need?
Anise Hyssop grows outdoors in USDA Zone 12a. Native to much of northern North America, Anise Hyssop is adapted to warm climates. In cooler regions, grow Anise Hyssop as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Anise Hyssop is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Agastache genus — compare its care with other Agastache species on PlantoScan.
Anise Hyssop tolerates low-light rooms and shaded spots — browse the full list of low-light plants.
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