AGASTACHE rupestris

Hyssop –


This terrific species is sometimes called Licorice or Rootbeer Plant, for the pleasantly fragrant silvery foliage. Plants form a bushy clump, bearing short spikes of salmon-orange flowers for months on end. Attractive to hummingbirds and butterflies. This thrives in hot, sunny sites, and is also excellent in containers. Although native to the southwestern USA, plants are surprisingly hardy so long as the site is very well drained during the winter months. Remove faded flowers regularly so that new buds will form. Flowers are edible.

Common Name:
Bloom Color:
Foliage Color:
Drought Tolerant:
Shade Tolerant:
Full Sun:
Partial Sun:
Deer Resistant:
Attracts Butterflies:


Summer, Fall
Grey Green




Site Selection
Plant your Agastache in a sunny spot in average to rich, well-drained soil. Add compost or peat humus to enrich and loosen the soil if needed, but they are very adaptable to almost any soil conditions. Remember to keep the soil light and airy for perennials, so cover them with loose soil and don’t pack it in after planting.

Planting Instructions
Growing Agastache can be done indoors as starts or you may direct seed into the garden in spring. Flowers will be produce more quickly on plants that are started indoors in May and transplanted in early summer. Agastache plant is hardy in USDA zones 4 to 10. Most plants can survive temperatures down to 10F if heavily mulched. Provide plenty of water when the plants are establishing but it can mostly fend for itself after it matures. Learning how to grow Agastache requires no special skills or care.

Agastache do not require much moisture, even after they are actively growing. Early season plantings (April and May) and plants that have no foliage should be started on the dry side. During that time we like to water lightly once and then we don’t water again until the foliage has started to emerge. When actively growing they can be watered once or twice a week or as needed if they wilt, allowing the soil to dry out between watering, however they are quite drought tolerant once established.

Companion Plants
Globe thistle – The stiff upright stems and steely blue flowers of globe thistle complement the airiness of hummingbird mint and team well with anise hyssop.
Mallow – Hollyhock mallow closely matches hyssop in height and growing requirements. Its pink flowers blend well with the color range of hyssop blooms.
Veronica – Veronica is a great foreground plant for hyssop. Its long season of bloom of pink, blue, or white spires sets off the foliage and flowers of hyssop.

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