The Guide to Grow and Care for Agastache (Anise Hyssop)

Agastache, commonly known as Anise Hyssop, Anise Mint, Blue Giant Hyssop, Fragrant Giant Hyssop, or Hummingbird Mint, is a beautiful and versatile perennial plant that adds a touch of color and fragrance to any garden. Known for its striking, showy flowers and delightful fragrance, Agastache is a favorite among gardeners and pollinators like butterflies and hummingbirds. This article will guide you through the essential aspects of caring for this lovely plant, including watering, light care, soil care, and much more. So let’s dive right in and learn how to make your Agastache thrive!

Main Caring Considerations


Agastache plants require average watering, which means they should be watered regularly but not excessively. It is essential to let the soil dry slightly between waterings to ensure the plant’s roots do not rot. Overwatering can lead to root rot and other diseases, so it is crucial to strike a balance between providing enough moisture for the plant to thrive and avoiding waterlogged soil.

Light Care

Agastache plants love full sun exposure, and they will thrive in areas where they can receive at least 6 hours of direct sunlight daily. The more sun they get, the more abundant and vibrant their blooms will be. If you live in an area with particularly hot summers, providing some afternoon shade can help protect the plant from scorching and wilting.

Soil Care

When it comes to soil, Agastache prefers well-drained, fertile soil with a pH ranging from acidic to alkaline. They can adapt to different soil types, including chalk, loam, and sand. However, it is crucial to ensure the soil drains well to prevent waterlogging and root rot. Adding organic matter such as compost or aged manure can help improve both the soil’s fertility and drainage.

Growing Region

Agastache plants are suitable for growing in USDA hardiness zones 5 to 12. These plants are quite adaptable and can thrive in various climates, from temperate to subtropical regions. Just make sure to provide the right care and conditions for your specific growing zone.

Growth Rate, Height, Size, and Spread

Agastache plants typically have a moderate growth rate, with some species reaching their mature size within two to three years. Depending on the specific variety, these plants can grow anywhere from 2 to 6 feet in height and spread up to 3 feet wide. When planning your garden, make sure to give your Agastache plants enough space to grow and develop without overcrowding.

Season and Temperature, Including Hardiness

Agastache plants bloom from midsummer to early fall, providing a long-lasting display of color and fragrance in your garden. They can tolerate a wide range of temperatures and are hardy in USDA zones 5 to 12. However, they are sensitive to extreme cold, so in colder climates, it’s essential to provide some winter protection, such as a layer of mulch to insulate the roots.


Pruning Agastache plants is essential for maintaining their shape and encouraging bushy growth. It’s best to prune in early spring, removing any dead, damaged, or weak stems. You can also trim back the previous year’s growth by about one-third to encourage new growth and an abundance of blooms.


Agastache plants produce tall, upright spikes of tubular flowers in various shades of blue, purple, pink, and occasionally white. These showy flowers have a delightful fragrance and make excellent cut flowers for arrangements. Deadheading spent blooms throughout the season will encourage continuous flowering and keep your Agastache looking its best.


Agastache plants are generally pest-resistant, but they can occasionally be affected by aphids, spider mites, or powdery mildew. Regular monitoring and early intervention with organic or chemical treatments can help keep these issues under control.

Attracts, Including Tolerance and Resistance

One of the most appealing aspects of Agastache plants is their ability to attract pollinators like butterflies and hummingbirds. They are also deer and rabbit resistant, making them an excellent choice for gardens where these animals are a concern. Additionally, Agastache plants are drought-tolerant once established, making them a low-maintenance option for water-wise gardens.

Garden Styles

With their showy flowers and fragrant foliage, Agastache plants are a versatile addition to various garden styles, including gravel and rock gardens, informal and cottage gardens, Mediterranean gardens, and prairie and meadow landscapes. Their lovely blooms and pollinator-friendly nature make them a valuable addition to any garden setting.

Companion Plants

When selecting companion plants for your Agastache, consider plants with similar growing requirements, such as Echinacea, Salvia, Sedum, and Rudbeckia. These plants will complement your Agastache’s growth habits and appearance, creating a visually appealing and harmonious garden display.

Frequently Asked Questions

Is Agastache toxic to pets?
Agastache plants are not considered toxic to pets. However, it’s always a good idea to prevent pets from chewing on plants to avoid potential health issues.

Can I grow Agastache in containers?
Yes, Agastache plants can be successfully grown in containers, provided they have adequate drainage and proper care. Just make sure to choose a container that is large enough to accommodate the plant’s mature size.


With their fragrant, showy flowers and easy-care nature, Agastache plants make a delightful addition to any garden. By following the care guidelines outlined in this article, you can enjoy the beauty and fragrance of these lovely perennials for years to come. Happy gardening!

Martin Duran

Hey y'all! My name is Martin Duran and I am from Cali, Colombia. Since 2018 I have been learning about plants and how to take care of them. Here's is my journey... “The clearest way into the Universe is through a forest wilderness.” ― John Muir

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