Agastache Liquorice Blue
Agastache Liquorice Blue is backordered and will ship as soon as it is back in stock.
Description
Description
If you want to see bees, butterflies, and hoverflies flocking to your border, plant Agastache. 'Liquorice Blue' produces tall, dense spikes of bottle-brush flowers in a stunning violet-blue that are richer in nectar than almost any other garden plant.
But it isn't just for the insects. As the name suggests, the foliage releases a powerful, delicious aroma of aniseed and liquorice when brushed against. It is a fantastic architectural plant, adding vertical structure to borders, and unlike many perennials, it flowers in its very first year from seed.
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🌿 Understanding the Plant
Agastache is a Hardy Perennial (often treated as a short-lived perennial).
Also known as "Korean Mint" or "Giant Hyssop," it originates from East Asia. It is incredibly vigorous and will bloom just a few months after sowing. While it can survive UK winters (especially in well-drained soil), it gives so much energy to flowering that many gardeners treat it as a fresh annual/biennial to ensure the best display.
The Scent: The essential oils in the leaves are strong. On a hot day, you can smell the liquorice scent wafting through the air without even touching the plant.
🌱 Growing Guide: How to Sow and Grow
Agastache is very easy to grow but hates wet feet in winter.
Germination:
Sow indoors from February to April. Surface sow onto moist compost and do not cover (they need light to germinate). Keep warm (20°C). Germination is usually rapid (7-14 days).
Where to Sow:
Plant out after the last frost. They need full sun and free-draining soil. If you have heavy clay, grow them in raised beds or add grit to the planting hole. They are drought tolerant once established.
Care While Growing:
Deadhead: While you can deadhead to encourage more blooms, the seed heads look beautiful in winter (standing like dark skeletons) and provide food for goldfinches.
📋 Plant Specifications
| Latin Name | Agastache rugosa 'Liquorice Blue' |
| Common Name | Giant Hyssop / Korean Mint |
| Hardiness | H4 (Hardy - likes drainage) |
| Light Required | Full Sun ☀️ |
| Height | ↕️ 70cm - 90cm (Tall) |
| Spread | ↔️ 45cm |
| Spacing | 🌱 40cm apart |
| Great for |
🐝 The #1 Bee Plant 🍵 Herbal Tea 🏰 Vertical Structure ✂️ Cut Flowers |
| Seed Count | Approx. 90 seeds per packet |
🤝 Perfect Garden Companions
The vertical blue spikes of Agastache look incredible with contrasting shapes and colours:
- 🌼 Rudbeckia 'Marmalade': The Colour Clash. The deep yellow/gold of Rudbeckia provides a vibrant contrast to the violet-blue of Agastache. Both flower late into the summer.
- 🌸 Echinacea (Coneflower): The Shape Contrast. The large, flat, daisy heads of Echinacea sit beautifully alongside the tall, thin candles of the Agastache. A classic prairie planting combination.
📅 Sowing & Flowering Calendar
Sow indoors in spring. Flowers July to October.
| Month | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow Indoors | 🟢 | 🟢 | 🟢 | |||||||||
| Plant Out | 🌱 | 🌱 | ||||||||||
| Flowers | 🌸 | 🌸 | 🌸 | 🌸 |
⚠️ Edible & Herbal
The leaves are 100% edible and are often used in East Asian cuisine. You can steep the fresh leaves in hot water for a refreshing, minty-liquorice tea that is said to settle the stomach.
🏆 Officially Recognised Excellence
Agastache is a superstar for wildlife. It is listed on the RHS Plants for Pollinators list and is widely considered one of the most effective plants for increasing biodiversity in a garden.
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