Anise Hyssop Agastache 'Purple Haze'

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Edible
‍🌱 Easy-care
giant hyssop 'Purple Haze'


Agastache 'Purple Haze' is a visually striking plant known for its vibrant and aromatic foliage, coupled with striking flower spikes. The leaves of 'Purple Haze' are typically a lush green color, and they emit a pleasant fragrance when brushed or crushed, reminiscent of anise or licorice. This aroma contributes to its attractiveness not just for humans but also for beneficial pollinators like bees, butterflies, and hummingbirds. The most eye-catching feature of the 'Purple Haze' is its flowers. The plant produces abundant long, tubular flowers that are a deep purple color, giving the plant its name. These blossoms are densely clustered on sturdy, upright spikes that rise prominently above the foliage. This floral display is particularly known for lasting through the summer and into the fall, providing a long period of visual interest and pollinator support. The overall form of 'Purple Haze' is upright and bushy, contributing to a full and textured look in garden spaces. This characteristic makes it a popular choice for adding vertical interest and a splash of color to borders, beds, or as a part of a mass planting. Its resilience and appealing presentation make it a favored choice among gardeners looking to create a garden that is both aesthetically pleasing and beneficial for local wildlife.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Anise Hyssop, Hummingbird Mint, Giant Hyssop, Licorice Mint

    • Common names

      Agastache 'Purple Haze'

  • skullToxicity

    • To humans

      The plant commonly known as Anise Hyssop, specifically the Agastache 'Purple Haze' variety, is not considered toxic to humans. Indeed, parts of the plant are often used in herbal teas and for culinary purposes due to their minty, anise-like flavor. Therefore, ingesting ordinary quantities of Anise Hyssop is not likely to cause poisoning or adverse health effects in humans.

    • To pets

      Anise Hyssop is also generally regarded as safe for pets. There is no well-documented evidence of toxicity to domestic animals such as dogs and cats. While individual animals may have sensitivities or allergic reactions to any plant, ingestion of Anise Hyssop is typically not associated with poisoning or serious health consequences in pets. However, as with any non-food plant, consumption in large quantities could potentially cause gastrointestinal upset or discomfort.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      2-3 feet (0.6-0.9 meters)

    • Spread

      2-3 feet (0.6-0.9 meters)

    • Plant type


    • Hardiness zones


    • Native area

      North America


  • money-bagGeneral Benefits

    • Attracts pollinators: Agastache 'Purple Haze' is known to attract bees, butterflies, and hummingbirds, which can help pollinate surrounding plants.
    • Drought-tolerant: Once established, this variety of hyssop is drought-resistant, making it suitable for xeriscaping or low-water gardens.
    • Aesthetic appeal: With its purple flowers and aromatic foliage, it adds color and texture to garden beds and borders.
    • Culinary uses: The leaves and flowers are edible and can be used to flavor various dishes and beverages.
    • Ease of care: Hyssop is relatively low-maintenance, requiring minimal care once it is established in the right conditions.
    • Deer resistance: This plant is typically resistant to deer, which can be helpful in areas where deer browsing is a problem.
    • Long blooming season: It has a lengthy flowering period from midsummer to fall, providing extended visual interest in the landscape.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Agastache 'Purple Haze' can be used as a natural dye for fabrics, with the flowers yielding shades of purple and pink depending on the mordant used.
    • The plant is suitable for creating fragrant potpourris, with its leaves and flowers adding a minty, anise-like aroma to the mixture.
    • It can be used in companion planting to attract pollinators like bees and butterflies to vegetable gardens, helping to increase the yield of crops.
    • Agastache 'Purple Haze' is ideal for crafting floral arrangements that hold their form and color well when dried.
    • The dried leaves can be used as a moth and insect repellent when placed in wardrobes or drawers.
    • It can serve as an eco-friendly confetti, with its small, vibrant purple flowers creating a colorful and biodegradable option for celebrations.
    • The flowers can be candied for decorative edible garnishes on cakes and desserts.
    • Agastache 'Purple Haze' can be used in edible landscaping, offering both aesthetic and culinary uses within garden design.
    • Leaves can be used to make a refreshing, aromatic foot soak to help relax and soothe tired feet.
    • The plant may be used in the creation of natural herb sachets, adding a sweet, licorice scent to linen closets.

Interesting Facts

  • bedFeng Shui

    The Agastache is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Agastache is not used in astrology practice.

  • spiralPlant Symbolism

    • Harmony: The soothing purple tones of Hyssop's flowers often symbolize peace and tranquility, which aligns with feelings of harmony and balance.
    • Healing: Historically, Hyssop has been associated with medicinal properties and its use in traditional medicine practices reinforces its symbolism as a healing plant.
    • Protection: In folklore, Hyssop is believed to offer protection against negative influences, which could be due to its strong aroma and historical use in purification rites.
    • Sacrality: Hyssop has been mentioned in religious texts and was used in ancient sacred rituals, which imparts a spiritual or holy significance to the plant.

Every 1-2 weeks
2500 - 10000 Lux
Every 2-3 years
Late Spring-Early Summer
As needed
  • water dropWater

    Hyssop or Agastache 'Purple Haze' prefers to be watered deeply but infrequently to encourage strong root growth. When the top inch of the soil feels dry, it is time to water the plant—typically this could be once a week during active growing seasons, or less often during cooler months. A good rule of thumb is to provide approximately one gallon of water for each plant during a watering session, ensuring the moisture reaches the root zone. During particularly hot or dry spells, you may need to water more frequently, but always check soil moisture before adding water to prevent overwatering.

  • sunLight

    Hyssop thrives best in full sun which means it should receive at least six hours of direct sunlight daily. The ideal spot for planting Hyssop 'Purple Haze' would be an area that offers unfiltered sunlight for the majority of the day. However, it can tolerate some partial shade, particularly in hotter climates.

  • thermometerTemperature

    Hyssop is relatively hardy and can withstand a range of temperatures. It thrives best in temperatures between 60°F and 80°F but can survive minimum temperatures down to about 20°F. The maximum temperature it can generally tolerate without stress is about 90°F, but it's important to ensure adequate watering in higher temperatures.

  • scissorsPruning

    Prune Hyssop in early spring to remove any dead or damaged growth and to encourage bushiness. Deadheading, or removing spent flowers, can be done throughout the blooming season to promote additional flowering. A more thorough pruning might be needed every few years to rejuvenate older plants, best performed in the late winter or early spring.

  • broomCleaning

    As needed

  • bambooSoil

    Anise Hyssop 'Purple Haze' thrives best in well-draining soil with a pH range of 6.0 to 7.0, which is mildly acidic to neutral. A suitable soil mix for 'Purple Haze' can consist of a blend of garden soil, compost, perlite, and a small amount of sand to improve drainage. It's essential to avoid waterlogged conditions to prevent root rot.

  • plantRepotting

    Anise Hyssop 'Purple Haze' should generally be repotted every 2-3 years to refresh the soil. When you notice slowed growth or roots emerging from drainage holes, it is time to consider repotting into a slightly larger container.

  • water dropsHumidity & Misting

    Anise Hyssop 'Purple Haze' is not particularly humidity-sensitive and can do well in average garden humidity levels. Providing good air circulation around the plant will help prevent any humidity-related issues.

  • pinSuitable locations

    • Indoor

      Place Anise Hyssop 'Purple Haze' in a sunny spot with some afternoon shade.

    • Outdoor

      Plant Anise Hyssop 'Purple Haze' in full sun with well-draining soil.

    • Hardiness zone

      Anise Hyssop 'Purple Haze' is suitable for 5-10 USDA hardiness zones.

  • circleLife cycle

    Agastache 'Purple Haze', commonly known as Hyssop 'Purple Haze', starts its life cycle with seed germination, which requires a well-draining soil mixture and light for optimal growth. The seedlings emerge and grow into young plants, developing a sturdy root system and foliage. The vegetative stage follows, where the plant increases in size and produces its characteristic fragrant leaves. During the flowering stage, usually in late spring to summer, 'Purple Haze' produces tall spikes of tiny, tubular purple flowers that are attractive to bees, butterflies, and hummingbirds. After pollination, the flowers will set seeds, completing the reproductive cycle. In winter or adverse conditions, the plant may die back to the ground, but it can return from the roots or self-seed the following spring.

  • sproutPropogation

    • Propogation time

      Late Spring-Early Summer

    • The most popular method of propagating Agastache 'Purple Haze', commonly known as Hyssop or Hummingbird Mint, is through seed sowing. Seeds can be started indoors in late winter, about 6-8 weeks before the last frost date. They should be sown in seed-starting trays or pots filled with a well-draining soil mix. Lightly press the seeds into the soil without covering them as they require light for germination. Keep the soil moist but not waterlogged and maintain a temperature of around 70 degrees Fahrenheit (21 degrees Celsius). Germination usually occurs within 1-4 weeks. Once seedlings have grown large enough to handle, they can be transplanted to individual pots and later moved to their final location outdoors after the danger of frost has passed.