How to grow and care for Agastache

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Agastache Taxonomy

  • Kingdom: Plantae (Plants)
  • Phylum: Angiosperms (Angiosperms are flowering plants.)
  • Class: Eudicots (Eudicots are a major group of flowering plants with two seed leaves.)
  • Order: Lamiales (Lamiales is the order of flowering plants to which Agastache belongs.)
  • Family: Lamiaceae (Lamiaceae is the family of mint family plants to which Agastache is a member.)
  • Subfamily: Nepetoideae (Nepetoideae is a subfamily within the family Lamiaceae.)
  • Genus: Agastache (Agastache is the genus that encompasses various Agastache species.)

Understanding Agastache: A Guide to this Versatile Herb


Agastache, commonly known as hyssop or hummingbird mint, is a versatile herb that is becoming increasingly popular among gardeners and herb enthusiasts. With its vibrant flowers and aromatic leaves, this herb not only adds beauty to your garden but also offers a myriad of beneficial uses.

From culinary delights to soothing teas and medicinal remedies, Agastache is truly a remarkable herb that deserves a place in every garden.

One of the remarkable features of Agastache is its versatility. This herb comes in a wide range of varieties, each with its own unique characteristics and uses.

Whether you prefer the bold purple blooms of Agastache foeniculum or the fiery red flowers of Agastache rupestris, there is a variety to suit every taste and gardening style.

Additionally, Agastache is known for its ability to attract pollinators, particularly hummingbirds and butterflies, making it an excellent choice for creating a vibrant and lively garden.

Selecting the Right Location for Agastache

When it comes to growing agastache, one of the most important factors to consider is selecting the right location. Agastache is a versatile herb that can thrive in various conditions, but it does have some specific preferences.

Here are a few key points to keep in mind when choosing where to plant your agastache.

First and foremost, agastache loves sunlight. This herb thrives in full sun, so it’s essential to select a location that receives at least six hours of direct sunlight each day. Look for a spot in your garden that is not shaded by trees or buildings, and where the sun’s rays can reach the plants throughout the day.

In addition to sunlight, agastache also prefers well-drained soil. This herb does not like to sit in waterlogged soil, as it can lead to root rot and other moisture-related issues. Therefore, it’s important to choose a location that has good drainage. If you have heavy clay soil, consider amending it with organic matter such as compost to improve its drainage capabilities.

Furthermore, agastache prefers soil that is slightly acidic to neutral, with a pH level between 6.0 and 7.0. You can check the pH level of your soil using a simple at-home testing kit, available at most garden centers. If your soil pH is too high or too low, you can adjust it by adding amendments accordingly.

Lastly, consider the proximity to other plants when selecting the location for your agastache. This herb is known for attracting pollinators, such as bees and butterflies, so it’s beneficial to plant it near other flowering plants. However, avoid planting it too close to aggressive spreaders or plants that require excessive watering or shade, as this can hinder the growth and overall health of your agastache.

Preparing the Soil: Essential Steps for Successful Growth

Preparing the soil is a crucial step in ensuring the successful growth of Agastache. Before planting this versatile herb, it is important to assess the soil conditions and make necessary amendments to provide the ideal environment for its growth.

The first step in preparing the soil is to test its pH level. Agastache thrives in slightly acidic to neutral soil, with a pH range of 6.0 to 7.5. If the pH level is outside this range, you may need to make adjustments by adding soil amendments.

For example, if the soil is too acidic, you can add lime to raise the pH level, while sulfur can be used to lower it if the soil is too alkaline.

Next, it is important to ensure that the soil is well-draining. Agastache prefers soil that is loose, well-aerated, and rich in organic matter.

If your soil is heavy or clay-like, you can improve its texture and drainage by adding organic matter such as compost or well-rotted manure.

Another essential step in preparing the soil is to remove any weeds or grasses that may compete with Agastache for nutrients and water. Clear the area and create a clean slate for your herb to thrive.

Planting Agastache: Tips for Proper Placement and Spacing

Planting agastache in the right location is crucial for its growth and overall health. This versatile herb thrives in full sun, so choose a spot in your garden that receives at least 6 hours of direct sunlight each day.

Agastache also prefers well-drained soil, so make sure the area has good drainage to prevent waterlogging. Avoid planting it in low-lying areas that tend to retain water.

When it comes to spacing, give each agastache plant enough room to spread out and grow to its full potential. The general rule of thumb is to space them about 12 to 18 inches apart, depending on the variety. This allows for proper air circulation, which helps prevent diseases and promotes healthy growth.

Giving them ample space also ensures that neighboring plants don’t compete for nutrients and water.

In addition to these placement and spacing tips, it’s important to consider the height of the agastache variety you are planting. Some varieties can reach up to 3 feet in height, so be mindful of this when selecting the location.

Plant taller varieties towards the back of your flower bed or garden to create a visually appealing display. The shorter varieties can be placed towards the front or in containers for a pop of color.

Watering Agastache: Finding the Balance for Optimal Growth

Proper watering is essential for the optimal growth of agastache plants. This versatile herb requires a balance of moisture to thrive and produce vibrant blooms. Over-watering can lead to root rot and other fungal diseases, while under-watering can cause the plants to wither and wilt.

To find the right balance, it is important to understand the specific watering needs of agastache. These plants prefer well-draining soil and dislike sitting in waterlogged conditions.

A good rule of thumb is to water deeply and thoroughly, allowing the water to penetrate the root zone. However, it is equally important to ensure that the soil is allowed to dry out slightly between watering sessions. This prevents the risk of over-watering and encourages the development of a healthy root system.

During periods of intense heat or prolonged dry spells, agastache may require more frequent watering. It is crucial to monitor the moisture levels in the soil and adjust the watering schedule accordingly.

Be mindful not to rely solely on visual cues, such as wilting leaves, as the plants may already be suffering from water stress by the time these signs become apparent. Instead, check the moisture level by sticking your finger about an inch into the soil. If it feels dry at that depth, it is time to water.

Remember that agastache is a drought-tolerant plant and can handle short periods of dryness. Therefore, it is better to slightly underwater than to over-water. By finding the right balance between moisture and dryness, you can ensure the optimal growth of your agastache plants and enjoy a bountiful harvest of fragrant leaves and vibrant blooms.

Fertilizing Agastache: Nourishing Your Plants for Vibrant Blooms

To ensure your agastache plants produce vibrant blooms throughout the growing season, proper fertilization is essential. Fertilizing agastache provides the necessary nutrients for healthy plant growth and abundant flowering. Here are some tips to help you nourish your agastache plants for optimal blooms.

1. Timing is Key
Timing is crucial when it comes to fertilizing agastache. Wait until the plant is established and actively growing before applying fertilizer. Typically, this occurs in early spring when the danger of frost has passed.

Applying fertilizer too early can disrupt the balance of nutrients in the soil and may lead to excessive leaf growth at the expense of blooms.

2. Choose the Right Fertilizer
Selecting the appropriate fertilizer is important for the specific needs of agastache. Look for a balanced, slow-release granular fertilizer with an N-P-K ratio (nitrogen, phosphorus, potassium) of 10-10-10 or 14-14-14. These ratios provide a good balance of nutrients without promoting excessive vegetative growth.

3. Apply Fertilizer Sparingly
When applying fertilizer to agastache, less is often more. Over-fertilization can lead to leggy growth and reduced blooming. Instead, apply a modest amount of slow-release fertilizer to the soil around the base of the plant, following the manufacturer’s instructions for application rates.

Lightly work the fertilizer into the top layer of soil and water thoroughly afterwards to help activate the nutrients.

4. Monitor and Adjust
Regular monitoring of your agastache plants is vital to ensure they receive adequate nutrition. Observe the overall health and growth of the plants, as well as the intensity and longevity of the blooms.

If the plants appear pale or show signs of nutrient deficiencies, such as yellowing leaves or stunted growth, it may be necessary to adjust the fertilization regimen. Conduct soil tests periodically to determine if any specific nutrients are lacking and make adjustments accordingly.

5. Other Nutritional Considerations
While proper fertilization is crucial, it is important to note that agastache plants thrive in well-draining soil with a pH range of 6.0 to 8.0. Ensuring these conditions are met will optimize nutrient uptake and utilization by the plants.

Additionally, organic matter, such as compost or well-rotted manure, can be incorporated into the soil prior to planting to enhance overall soil fertility and structure.

Managing Pests and Diseases: Keeping Agastache Healthy

Agastache, with its vibrant and aromatic blooms, is a delightful addition to any garden. However, like any plant, it can be susceptible to pests and diseases that can hinder its growth and beauty. With proper management and care, you can keep your Agastache healthy and thriving.

One common pest that can affect Agastache is the aphid. These tiny insects feed on the sap of the plant, causing the leaves to distort and curl. To combat aphids, you can use a mixture of water and dish soap to create a natural insecticidal spray.

Simply spray the solution onto the affected areas, making sure to target the undersides of leaves where aphids tend to hide. Another method is introducing natural predators such as ladybugs or lacewings, which feed on aphids and help control their population.

In addition to pests, Agastache can also be susceptible to various diseases, such as powdery mildew. This fungal disease appears as a white powdery coating on the leaves and can stunt the growth of the plant.

To prevent powdery mildew, it is important to provide adequate air circulation by spacing your Agastache plants properly and avoiding overcrowding.

If you notice signs of powdery mildew, you can treat it by applying a fungicide specifically formulated for this type of disease. Regularly inspecting your plants and promptly addressing any signs of pests or diseases will help ensure the health and vitality of your Agastache.

Pruning Agastache: Maintaining Shape and Encouraging Growth

Pruning is an essential task when it comes to maintaining the shape and encouraging the growth of your Agastache plants.

By removing dead or damaged foliage, you not only improve the overall appearance but also create space for healthy new growth. This promotes air circulation and prevents diseases from taking hold.

When it comes to pruning Agastache, timing is crucial. It’s best to prune in early spring, just as new growth begins to emerge. This allows the plant to recover quickly and reduces the risk of damaging the tender shoots.

Start by removing any dead or yellowing leaves, cutting them back to the base of the plant. Take care to avoid cutting into the healthy stems, as this can hinder growth. Additionally, you can trim back any overly long stems to maintain a more compact shape.

Regular pruning not only keeps your Agastache plants looking tidy but also encourages new growth. By selectively removing old and spent flowers, you can redirect the plant’s energy towards producing more blooms.

As the season progresses, you may notice that some stems have become leggy or sparse. This is a good opportunity to give the plant a gentle overall trim, cutting the stems back by a third. This will promote bushier growth and prevent them from flopping over. Remember to always use clean and sharp pruning tools to minimize the risk of introducing diseases.

Propagating Agastache: Multiplying Your Herb Collection

Whether you want to expand your agastache collection or share the joy of this versatile herb with friends and family, propagating agastache is an excellent way to multiply your herb collection. With a few simple techniques, you can successfully propagate agastache and enjoy the rewards of a thriving herb garden.

One popular method of propagating agastache is through stem cuttings. Start by selecting a healthy, mature plant with strong stems. Using a sharp, clean pair of scissors or garden shears, take a cutting from the top portion of the stem, just below a leaf node.

Remove any lower leaves, leaving only a few sets of leaves at the top. Dip the end of the cutting in a rooting hormone powder to encourage root development, then plant it in a well-draining potting mix.

Keep the cutting in a warm and bright location, ensuring that the soil remains consistently moist but not waterlogged.

In a few weeks, you should see roots starting to form, indicating successful propagation.

Another method for propagating agastache is through division. This technique is especially beneficial for older plants that have become overcrowded or are showing signs of decline. Start by gently digging up the clump of agastache, taking care to preserve as much of the root system as possible.

Using a sharp knife or shovel, carefully divide the clump into smaller sections, ensuring that each section has its own set of roots and shoots.

Replant the divided sections in well-prepared soil, making sure to space them adequately to allow for future growth. Water thoroughly after planting and continue to provide care as you would for established agastache plants.

By mastering the art of propagation, you can easily increase the number of agastache plants in your herb collection.

Whether you choose to propagate through stem cuttings or division, remember to provide the right conditions and care to support the growth of the newly propagated plants. With patience and diligence, you’ll soon have a thriving collection of agastache that brings beauty, fragrance, and flavor to your garden.

Harvesting and Using Agastache: Enjoying the Fruits of Your Labor

Agastache is not only a beautiful herb to have in your garden, but it also offers a variety of culinary and medicinal uses. Harvesting agastache is a simple process that can be done throughout the growing season.

When the flowers are in full bloom, simply snip off the stems just above a leaf node. This will encourage new growth and ensure a continuous harvest.

It’s best to harvest in the morning when the essential oils are at their peak. Once you’ve harvested your agastache, there are numerous ways to enjoy its flavorful and aromatic properties.

One way to make the most of your agastache harvest is by using it in teas. The leaves of the herb can be dried and steeped in hot water to create a soothing and refreshing herbal tea.

The minty and floral flavors of agastache blend well with other herbs like chamomile or lemon balm. You can even add a few dried flowers for an extra pop of color and flavor.

Agastache tea is not only delicious, but it also offers a range of health benefits, including promoting digestion and soothing sore throats. So sit back, relax, and sip on a cup of agastache tea for a moment of tranquility.

Another way to enjoy the fruits of your labor is by using agastache in cooking. The leaves of the herb can be chopped and added to salads, dressings, or marinades for a burst of flavor.

Agastache pairs well with citrus, berries, and other herbs like basil or mint. You can also infuse agastache into oils or vinegars to create unique and aromatic dressings.

The flowers of agastache can be used as a garnish or added to desserts and baked goods for a touch of color and sweetness. The possibilities are endless when it comes to incorporating agastache into your culinary creations.

Whether you choose to enjoy agastache in a cup of tea or add it to your favorite recipes, harvesting and using this versatile herb is sure to enhance your gardening experience. So go ahead, explore the flavors and aromas that agastache has to offer and savor the fruits of your labor.


How do I select the right location for growing agastache?

When choosing a location for agastache, consider factors such as sunlight exposure, soil type, and drainage. Agastache thrives in full sun, so select a spot that receives at least 6-8 hours of direct sunlight per day. The soil should be well-draining to prevent waterlogged roots. Sandy loam or loamy soil with a pH of 6.0-7.5 is ideal for agastache.

What are the essential steps for preparing the soil for agastache?

To prepare the soil for agastache, start by removing any weeds or grass from the planting area. Loosen the soil using a garden fork or tiller, ensuring it is crumbly and well-drained. Incorporate organic matter like compost or well-rotted manure to improve soil fertility and drainage. Lastly, level the soil surface before planting.

How should I properly plant agastache and how much spacing should I provide between plants?

Dig a hole that is slightly larger than the root ball of the agastache plant. Place the plant in the hole, ensuring that the top of the root ball is level with or slightly above the soil surface. Backfill the hole with soil and gently firm it around the plant. Space agastache plants about 12-18 inches apart to allow for adequate air circulation and growth.

What is the proper watering technique for agastache?

Agastache plants prefer moderate moisture levels and should be watered deeply but infrequently. Water the plants at the base rather than overhead to avoid wetting the foliage. Allow the soil to dry slightly between waterings to prevent root rot. Adjust the watering frequency based on weather conditions and the moisture needs of the plant.

How can I fertilize agastache to promote vibrant blooms?

Agastache benefits from a balanced slow-release fertilizer applied in early spring or late winter. Use a fertilizer with a ratio of 10-10-10 or 14-14-14, following the manufacturer’s instructions for application rates. Avoid over-fertilizing, as it can lead to excessive foliage growth at the expense of blooms. Regularly applying compost or organic matter can also provide additional nutrients.

What steps can I take to manage pests and diseases that may affect agastache?

Agastache is generally resistant to pests and diseases. However, some common issues include aphids, spider mites, and powdery mildew. To manage aphids and spider mites, spray a strong stream of water on the affected plants or use insecticidal soap if necessary. To prevent powdery mildew, ensure proper air circulation, avoid overhead watering, and remove any infected foliage promptly.

Is pruning necessary for agastache plants?

Pruning agastache is not necessary for their overall health but can help maintain their shape and encourage bushier growth. In early spring or late winter, trim back the dead or damaged stems to promote new growth. Additionally, you can deadhead the faded flowers throughout the blooming season to encourage continuous flowering.

How can I propagate agastache to expand my herb collection?

Agastache can be propagated through division or by taking stem cuttings. To divide the plant, carefully dig up the mature clump and separate it into smaller sections, ensuring each division has enough roots. Replant the divisions in well-prepared soil. For stem cuttings, take 4-6 inch cuttings from non-flowering stems, remove the lower leaves, and plant them in a well-draining potting mix. Keep the cuttings moist and provide them with bright, indirect light until they root.

How do I harvest and use agastache?

Agastache leaves and flowers can be harvested for culinary or medicinal use. To harvest, snip off the leaves or flowers just above a leaf node or where the stem meets another stem. Rinse the harvested parts gently under running water and pat them dry. Agastache can be used fresh in teas, salads, or garnishes, or dried for later use. Store dried leaves and flowers in airtight containers in a cool, dark place.