General
Anise hyssop is a hardy, aromatic perennial in the mint family with upright growth and lavender-purple flower spikes. The leaves have a sweet anise and licorice scent and are commonly used for herbal teas, desserts, and as edible garnishes. Native to North America, it is well adapted to cold winters and relatively dry summers. The plant combines ornamental value with culinary and ecological benefits, making it suitable for herb gardens, perennial borders, and wildlife-friendly plantings.
Light
Full sun to partial sun; flowering and aroma are best in full sun.
Soil type
Well-drained loam or sandy soil; dislikes heavy, waterlogged clay.
Water requirement
Medium; water regularly during establishment, then moderately.
Nutrient requirement
Low to medium; excessive fertilization reduces aroma and sturdiness.
Precultivation
Seeds germinate easily when surface-sown in light and moist seed compost. Maintain even moisture without covering seeds deeply, as light improves germination. Seedlings grow steadily and can be potted on once they develop true leaves. Harden off gradually before planting outdoors.
Planting
Plant out after the risk of frost when soil has warmed to at least 10°C. Space plants about 40–50 cm apart to allow good airflow. Choose a sunny, well-drained location. In heavy soils, raised beds or sand-amended planting holes improve winter survival.
Pruning
Remove spent flower spikes during summer to prolong blooming and prevent excessive self-seeding. Leave stems standing over winter to protect the crown and provide winter interest, then cut back fully in spring.
Maintenance
Water regularly during the first growing season. Once established, anise hyssop needs little care beyond occasional watering during prolonged drought. Apply a light compost mulch in spring. Avoid high-nitrogen fertilizers, which promote soft growth and reduce essential oil concentration.
Harvest
Harvest young leaves before flowering for the most intense flavor, or collect flowers during peak bloom. Leaves and flowers can be used fresh or dried for tea. Regular harvesting encourages bushier growth.
Common issues
Generally trouble-free. Root rot may occur in poorly drained soils. Powdery mildew can appear in crowded or shaded conditions but is usually minor.
Pollination
Insect-pollinated, especially by bees and butterflies.
Companion plants
Echinacea, rudbeckia, lavender, yarrow, ornamental grasses.
Incompatible plants
Plants requiring constantly wet soil or very heavy feeding.
