How to Grow Anise Hyssop? [Guide]

Agastache foeniculum is a perennial plant. 

Commonly called anise hyssop, lavender giant hyssop, blue giant hyssop, and fragrant giant hyssop.

They belong to the Lamiaceae or mint family and are native plants of the central and northern regions of North America. They are also found in Canada.

How to Grow Anise Hyssop

It is an edible plant that is used to make tea and has many health benefits.

In 2019 anise hyssop received the title of the international herb of the year.

In this article, you will learn everything about how to grow anise hyssop.

So let’s get started:

How Anise hyssop looks like

This is a flowering plant that grows from 2 to 4 feet tall and spreads 1 foot wide. 

They are invasive so you have to prune them from time to time otherwise they will take over most parts of the garden.

Its flowers grow in a clump or group, upward and upright shape with tall blooms.

The flower can catch the eyes from a long distance.

They are found in blue, purple, lavender, and green colors. 

Bees LOVE Anise-Hyssop

The flowers bloom from June to September with vibrant lavender flowers which become more colorful near the tip of the bloom.

Their leaves are light green and oval in shape with a white tint underneath which is not edible by wild animals like deer and rabbits.

However, the plant’s bloom attracts pollinators like honeybees, butterflies, hummingbirds, and other insects.

The bees love their bloom as it provides them with enough nectar to produce honey. You will see the bees on the flowers from early morning till dusk.

Anise hyssop thrives in hardiness zones 4-9. If you live in these zones you can easily grow them. They are also frosted tolerant and live up to 2-3 years.

Related post: How to grow cornflower plants in the garden

How to Grow Anise Hyssop in a Pot

Anise hyssop is a frost-tolerant perennial plant. They can survive in the winter. 

anise hyssop

Start growing them 2-3 weeks before the last frost to enjoy the bloom in the spring season.

Here is what to do first:

  • Take a medium-sized pot of 6 inches in diameter. The pot should be wide enough so that the roots of the plant can spread deeply.
  • Make sure that the pot has adequate or sufficient drainage holes. Drainage holes help to flow out excessive water from the plant.
  • Plants need minerals and nutrition to grow. Use potting mix soil for gardening. You can also mix some organic compost in the soil to increase its quality.
  • Adding organic compost to the soil is a good investment as it will save you to feed with fertilizers in the growing season. 
  • Put 2-3 seeds in the center of the pot and press them onto the soil. Sowing more seeds in a limited space pot makes it crowded.
  • Do not use dry or old seeds, it takes more time to germinate and even does not germinate.
  • Pour water to keep the soil moist. Plants like moist soil but do not like to stand in the water. Overwatering causes lots of problems in plant growth.
  • You can add mulch to the surface of the soil. Mulch helps to keep the soil moist for a longer time and requires less frequent water.

Related Post: 14 Shade Perennial Plants For Beautiful Garden

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Where to place the pot?

You should place the pot in a spot where it gets early morning sunlight and afternoon shade. The mid-afternoon sunlight is more harsh or intense as compared to the morning, it may burn young plants’ leaves, especially in the hot summer.

When to Transplant from the Pot?

Anise hyssop is a large bloom plant that needs a strong and wide root system to stand. They cannot grow to mature size in a pot or a container despite how wide and deep it is.

anise hyssop

So, after a point, you have to transplant them in a large garden area. I recommend planting them when the seedlings become 5-6 inches.

In this stage, the young plant’s root has not got too deep and strong which can be easily transplanted.

Take a grub hook, start tossing it from the circumference or side of the pot, and transplant it to a decided place.

You should plant them in a sunny and partial shade area (Discussed in the where to place the pot question)

Related post: How to grow beautiful Marigold flowers (Easily)

How to Propagate Anise Hyssop from Seeds

You can propagate these perennial shrubs by three propagation methods.

Anise Hyssop

Let’s see them one by one:

From seeds

Propagation from seeds is easy but there are some points to keep in mind

Always use fresh pairs of seeds. Sowing dried or old seeds might not germinate. You can buy fresh seeds from a nearby nursery or online store.

Sow only 2-3 seeds. Make a small hole in the soil and put 2-3 seeds. Sowing more seeds in a particular area will stunt the growth when plants mature.

Maintain some distance. When sowing seeds in the ground you should maintain nearly 6 feet of gap between each seed hole. This planting arrangement provides young plants enough area to take water and nutrition from the ground.

From stem cutting

  • Stem cutting is a common practice to propagate any plant. However, you have to do things correctly to get successful.
  • Select any node stem and cut it using sharp shear. Do not tear or break the stem, it might leave damage on the plant. 
  • Clear all leaves from the bottom half of the stem cutting and plant them on the ground.
  • Dip one end of the stem cutting in rooting hormone to have an addiction growth support. Using a rooting hormone is optional. 
  • In the beginning, it might look wilt but after a couple of weeks, the stem starts rooting and slowly gets in shape.

From Division

Propagation from the division of the plant is a tricky method. You can create a hybrid by using these methods. 

Here is what to do:

  • Take a sharp shear and cut a stem from the plant.
  • Make the same cut on some other plant and join them together with a piece of cloth. Rap cloth around the cutting and join them.
  • After a few weeks, they get joined and start growing.
  • Plants or trees which are propagated from division generally do not produce seeds.

Learn about anise hyssop companion plants you grow with. This herbaceous plant has many benefits that can help its nearby plants thrive properly.

Related post: How to grow Asiatic jasmine vines to cover ground

How to care for anise hyssop

The Anise hyssop variety does not need much care, it is a perennial plant and grows itself in favorable conditions.

Anise Hyssop


  • For gardening always use high-quality soil. Many people plant their plants in the ground directly. 
  • However, in the ground soil minerals and nutrition are not present in the required quantity.
  • You can use potting mix soil for gardening. Make a medium-sized hole in the ground.
  • Put potting mix soil into it and transplant your plant there. Pour water to moisten the soil.
  • You can also do a pH check of your ground soil. The anise hyssop prefers soil pH of 6.0-7.5.


Overwatering can cause diseases such as root rot and powdery mildew. Root rot is a disease caused by overwatering. 

The roots of the plant get weak or damaged by excessive water which stunts the growth to sometimes kills the plant. So, it’s very essential to water the plant because only when the soil looks dry.

Avoid watering from the top of the plant. Watering from the top wet the stems and leaves which increases the chance of fungal disease. 

So, always water directly in the base of the plant.


For quick and healthy growth feed your plant with nutrition-rich fertilizer in the growing season.

In the growing season or spring, you can feed them once in a month for abundance.

Fertilize with an all-purpose, well-balanced product such as 10-10-10 (NPK).

How to prune anise hyssop

Pruning is the most important part of the plant’s growth. 

The flowers and leaves of the plant often get wilt or dry. 

These yellow-brown parts of the plant need to be deadhead or cut off from time to time.

Prune flower

Though these leaves and blooms look dry or dead.

But, they keep sucking energy from the plant.

Deadheading these parts will redirect energy to grow new parts and encourage more blooms and leaves.

In the winter, pruning sends the plant dormant so that it regrows in the spring.

To send plants dormant cut some of the node’s stems by shearing.

How to harvest anise hyssop

Flower cuttings of the anise hyssop are used for decoration. If you want to use them as ornamental flowers, you can cut them when the flowers get fully matured.

Take a shear and cut the entire branch on which it blooms so that you can put them in a long case.

Take as many cuttings as you want, make their bunch, and tie them with a wide string in the bottom.


Put the flower bunch in the pot half-filled with water.

The water helps them to live fresh for a longer period.

Place the beautiful bloom in a dark room. Dark places will preserve their color for a longer time. 

If you want seeds to grow, plant them in a new place or give them to your friends.

Then wait till the flowers get dry or in a position to drop from the stem.

Sniff off the dry or dead flowers and put them on paper or a box to collect their small seeds and place the box in the sunlight for 2-3 days.

Related post: How to grow, care and harvest Calamint herb

How to dry Anise hyssop

Anise hyssop leaves are used as an alternative to mint. You can use them to add flavor to your dish or drink. 

Remember in our childhood we all used to drink chilled mint water or at least I do.

Anyway, you can sniff off its leaves whenever you want to use it. Or You can store them in a bulk. Sniff off the number of leaves you want to store.

Dry flower

Place all the leaves in the cardboard box and let it get dry in direct sunlight for 2-3 days.

After that, you can store all the leaves in an airtight container or packet and put them in the freezer.

It can be preserved for almost 1 year if the leaves do not get moist. The flowers of the anise hyssop are used to decorate foods and salads. 

Well, you cannot store flower heads as they get dry. If you want to add them to the food you have to sniff them directly from the plant at the time of food decoration.

Gardening Guide

Plant typePerennial flowering plantFlower ColorPurple, violet, lavender, blue
Native To North USFamilyLamiaceae
Hardiness (USDA Zone):4-9Avoid plantingBlack walnut
Bloom timeSummerGenusAgastache
ExposureFull sun to partial shadeSpecies A. Foeniculum
Time to get maturePlant in fall for spring growthFlower colorpurple, green, lavender, blue
Spacing6 feetMaintenance Moderate
Planting depth1/2-2 inches, check seed packetsSoil type Average
Height2-4 feetSoil pH 6.0 – 7.5
Spread1.5 – 3 feetSoil Drainagewell-drainage
Water needModerateCompanion plantingRussian sage, yarrow, global thistle, Joe Pye
weed, ornamental grass
ToleranceDeers, rabbits, and frostUses To add flavor to drink
AttractsPollinators like honeybees, butterflies, hummingbirds, etcPests & diseaseRoot rots, powdery mildew, aphids

Pests and diseases

Anise hyssop is a wild plant that is mostly found in forests and roadsides. They are adaptable to most diseases.  Planting them in the garden does not need much care to prevent diseases.

However, there is a danger of fungal disease if:

ant on anise hyssop

The plant does not get sufficient air. This can be caused if you plant them closely when transplanting and maintains at least 6 inches of gap between each plant.

Overwatering plant is a common mistake every beginner gardener makes. The plant needs a lot of water to grow. They can grow happily in moist soil.

Overwatering plants cause several problems such as root rot, leaf spot, crown root, and powdery mildew. If they pour excessive water for a long time they may also die. It also attracts insects like Ants and Aphids.

Poor drainage happens when plants get crowded. This prevents the evaporation of water and the moisture gets settled on foliage and in the soil which makes a good environment for the growth of fungal diseases.

To get rid of fungal diseases you can treat the plant with neem oil or use a fungicide as per the instruction in the packet.

Did I Miss Anything?

Now I’d like to hear from you: which tip from today’s post are you going to try first?

Or maybe, I didn’t mention your favorite plant-growing tip. Either way, let me know by leaving a comment below right now.

P.S. I myself reply to every comment

Before going if you want to grow beautiful flowers in your garden? Then click on these articles also.

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How to grow and care for wax begonia

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