Growing Guide: Korean Mint
Growing Tips
(Also known as: Korean Licorice Mint, Purple Giant Hyssop, Wrinkled Giant Hyssop; botanical synonyms may include Agastache rugosa f. alba)
Plant Korean Mint in full sun to light shade, in well-drained, moderately rich soil. Water regularly during establishment and provide consistent moisture during hot weather, though mature plants tolerate short dry spells. It thrives in warm summers and withstands light frost, returning reliably in milder climates. Feed with a balanced organic fertilizer or compost in spring to encourage lush foliage and abundant blooms. Trim spent flower spikes to extend flowering and maintain tidy growth. Suitable for both in-ground beds and containers, though containers may require more frequent watering. This plant grows quickly in warm conditions and benefits from good air circulation to prevent mildew. Expect harvestable leaves within the first season, with peak aroma just before flowering.
| Attribute | Details |
|---|---|
| Botanical Name | Agastache rugosa |
| Common Names | Korean Mint, Korean Licorice Mint, Purple Giant Hyssop, Wrinkled Giant Hyssop |
| Family | Lamiaceae |
| Origin | East Asia (Korea, China, Japan, surrounding regions) |
| Plant Type | Herbaceous perennial |
| Life Cycle | Perennial |
| Mature Size | 2–4 ft × 1–2 ft |
| Light | Full sun to light shade |
| Water Needs | Moderate |
| Soil | Well-drained, moderately fertile soil |
| Bloom Time | Summer to early fall |
| Flower Color | Lavender-violet (white forms also exist) |
| USDA Zones | 4–9 |
| Florida Native | No |
| Propagation | Seeds, cuttings |
| Seasonal Traits | Deciduous in cold climates; semi-evergreen in mild regions |
| Time to Harvest | First growing season for leaves; mid-season for blossoms |
