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A picture of a Giant Hyssop

Giant Hyssop

Agastache rugosa

Also known as

Nettle-Leaved Hyssop, Korean Mint, Wrinkled Giant Hyssop, Chinese Giant-Hyssop, Korean-Mint

Full Sun
Easy care
Moderate watering
Frost Hardy

8a

USDA zone

-12°C

Minimum temperature

Expected size

Height
Spread

1.2m

Max

60cm

30cm

Min

20cm

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has a mild fragrance

Overview

Ideal plant to add colour to the garden in late seasons when plants are fading. Provides a striking colourful impact to beds, containers, borders, herb gardens and landscaping. It is part of the Mint family and used as herb in recipes.

Common problems

Powdery mildew

Harvesting

Harvest leaves and stems in Springs/early winter/late summer removing the leaves of the stem.

Propagation

Division

Divide plants in spring.

Seed

Sow seeds in spring in a greenhouse or warm area and only just cover the seed. Plant out in late spring or early summer.

Cuttings

Take cuttings of young shoots in spring. Re-pot young shoots (10 - 15cm) tall in a lightly shaded position in a greenhouse/warm area. Roots appear within 3 weeks. Plant out in summer/following spring.

Special Features

Attracts useful insects

Butterflies and bees

Pot plant

Grows well in well-drained soil in pots, beds and containers.

Drought resistant

Drought tolerance.

Indoor plant

Put pots under direct sunlight in well-drained soil. Prune and remove spent flowering spikes through the season.

Attracts birds

Hummingbirds and nectar feeders

Uses

Medicinal

Leaves and stem are used to improve the appetite and strengthen the digestive system, it relieves symptoms such as abdominal bloating, indigestion, nausea and vomiting. Also shows anticancer activity.

Edible

Young leaves - raw or cooked is used as a flavouring or as an addition to the salad bowl. The leaves can be used as a tea substitute. It has a pleasant flavour.