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Anise Hyssop

Agastache foeniculum

  • Fragrant Anise-Scented Foliage Attracts Butterflies, Hummingbirds & Pollinators All Summer
  • Cold Hardy: Thrives in Zones 4-8
  • Grows 2-4 ft Tall, 2-3 ft Wide
  • Deer Resistant, Disease Resistant, Rabbit Resistant
  • Sweetly Fragrant Flowers
Regular price $3487
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Plant Size

Planting & Care

Where to Plant

  • Sunlight: Aim for a spot that receives at least six hours of direct, unfiltered sun daily. While Anise Hyssop accepts partial shade, full sun is key for developing its characteristic intense purple flower color and maximizing its fragrant essential oils. Less sun results in fewer flowers and a tendency for the stems to flop.
  • Soil: This plant prefers a light, well-drained site. It thrives in average to lean soil and genuinely hates having wet feet, which can lead to root rot. If you have heavy clay, incorporate plenty of coarse sand or grit along with compost to improve porosity and ensure that water drains freely away from the crown.

Watering Requirements

During the first season, water deeply once the top few inches of soil are dry to help the plant anchor a strong root system. Once established, Anise Hyssop is quite drought tolerant and requires little supplemental moisture. Allowing the soil to stay constantly saturated or watering inconsistently during a dry spell will stress the plant, resulting in smaller, sparse flower spikes.

Pruning Tips

Anise Hyssop blooms reliably on new growth, so the best time for shaping is in the early spring, just as the weather breaks. For a tidy appearance and to encourage a bushier habit, cut the entire plant back by about one-third of its height before new stems emerge. Think of this spring cut-back as a haircut that encourages vigor, and throughout summer, feel free to snip off spent flower spikes (deadhead) to extend the overall bloom period.

Fertilizer Needs

This hardy perennial requires very little feeding, often thriving best when left alone. If your soil is particularly poor, apply a light dressing of a balanced, slow-release granular fertilizer in early spring. Avoid applying high-nitrogen fertilizers, especially past mid-summer, because too much nitrogen encourages soft, weak growth that makes the plants leggy and reduces the amount of the coveted flower production.

Delivery and Shipping

Shipping Rates

Ships in 7-10 business days • Tracking provided • Weather protected

Under $50 $9.99
$50 - $99.99 $14.99
$100 - $149.99 $16.99
$150 - $198.99 $24.99
$199+ FREE

✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee

Specifications

Plant specifications
Botanical Name Agastache foeniculum
Class Lamiales
Species foeniculum
Growing Zones 4-8
Height 2-4 ft
Width 2-3 ft
Sunlight Full sun, Partial shade
Growth Rate Moderate
Flower Color Blue, Purple
Leaf Color Green
Fragrant Yes
Bloom Period Early Summer, Late Summer, Early Fall, Late Fall
Does Not Ship To AK, HI, ID, MT, PR

Frequently Asked Questions

Is Anise Hyssop a fast-growing or slow-growing plant?

  • Anise Hyssop is a fast-growing perennial that will fill in quickly to create an impressive display. It establishes rapidly and blooms all summer long with minimal care required. Plant it in sunny areas where you want quick color and pollinator activity.

Is Anise Hyssop deer resistant?

  • Anise Hyssop is generally deer resistant due to its strong aromatic foliage that smells like licorice and mint. Deer typically avoid plants with intense fragrances, making this pollinator magnet a smart choice for areas with deer pressure. Shop at Nature Hills for this dual-purpose perennial.

How do I care for Anise Hyssop during winter in colder zones?

  • Anise Hyssop is quite cold hardy and will naturally die back to the ground after frost. In zones 4-8, simply cut stems down to 2-3 inches in late fall. Apply a light mulch layer around the crown for extra winter protection in the coldest zones.

Does Anise Hyssop need to be fertilized and how often?

  • Anise Hyssop thrives without regular fertilization and actually performs better in lean soils. Over-fertilizing can reduce flower production and weaken the plant's natural drought tolerance. A light application of compost in early spring is sufficient for most garden soils.

Will Anise Hyssop self-seed and spread in my garden?

  • Yes, Anise Hyssop readily self-seeds and will naturalize in your garden. It fills in fast to create marvelous displays with minimal care. Allow some flowers to go to seed if you want more plants, or deadhead to prevent spreading. Find quality Anise Hyssop plants at naturehills.com.

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