Reviewing
Cosmos 'Sensation' Seeds26 Aug 2026
Can't go wrong with Cosmos
Lovely packet of seeds, bought one for me and one as gift :)
Gareth
Agastache 'Astello Indigo' Seeds
Agastache Hybrida ‘Astello Indigo’
mint-scented spikes of purple flowers.
Enjoy the allure of Agastache Astello 'Indigo', known for its mint-scented spikes of vibrant purple flowers. Our Agastache seeds give a lush, well-branched growth, perfect for attracting pollinators to your garden. This gold award-winning variety is not just a visual delight but also a quick bloomer, with flowers appearing in just 15 weeks. Easy to grow and maintain, these seeds are ideal for gardeners looking to add a splash of colour and fragrance to their outdoor space.
Approx 10 seeds
- Balcony Friendly
- Low Maintenance
- Tolerates Most Light
- Hardy Perennial
Agastache 'Astello Indigo' Seeds – Quick Growing Guide
Agastache 'Astello Indigo' seeds produce mint-scented flowers that attract pollinators and thrive in partial shade. Sow from February to May, enjoy blooms from mid-summer, and benefit from a hardy, cottage garden favourite tolerant of shade and well-drained soil.
How to Sow, Grow and Harvest Agastache 'Astello Indigo' Seeds
- Sow:Feb–May
- Germination:10–21 days
- Grow:Full sun to partial shade, well-drained soil
- Water:Regular watering, keep soil moist but not waterlogged
- Harvest:Flowers from mid-summer; deadhead to prolong bloom
- Best for:Cottage gardens, pollinator-friendly borders, pots, shade-tolerant flower beds
Agastache 'Astello Indigo' is a charming addition to any cottage garden, prized for its vibrant purple flowers and sweet mint fragrance. This award-winning variety grows quickly and thrives in a range of light conditions, including partial shade. Perfect for attracting bees, butterflies and hummingbirds, it adds both colour and life to your outdoor space.
Delivered within 2–3 working days. On its own, this packet ships letterbox delivery at £2.25. Fits through a standard letterbox, so no one needs to be home.
Delivery is priced on the size of your whole order, so adding more may move it into the next band:
- Letterbox delivery — small orders
- £2.25
- Standard delivery — most orders
- £4.50
- Standard delivery (multiple parcels) — large orders
- £7.50
- Free delivery (orders £60 and over)
- Free
Gifting. We can include a handwritten note — add your message at checkout.
More info in our FAQs, or get in touch if something hasn’t arrived.
Grow in Your Garden
Agastache 'Astello Indigo' – Mint-Scented Purple Blooms
Calendar
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SowFlowers / Harvest
How to Grow
Agastache 'Astello Indigo' seeds can be started indoors from February to May or sown directly outside after the last frost in well-drained soil. This perennial thrives in containers or garden beds where it can develop its mint-scented purple blooms throughout the summer months.
Sowing
Sow the seeds on firm, damp soil, lightly patting them down without covering, and place them in a warm, sunny spot to encourage germination. Maintaining consistent moisture during sowing from February to May will support successful sprouting.
Growing
Once seedlings are established, thin them or pot on to allow adequate space for growth, ideally in 30 cm pots or garden beds. This helps accommodate their mature size and supports healthy development during the growing season from July to October.
Plant care
Keep the soil consistently moist but avoid waterlogging, especially during dry spells in summer. Deadhead spent flowers regularly to encourage prolonged blooming and maintain the plant's attractive appearance. Given its self-sufficient nature, minimal feeding is required, making it easy to care for in both containers and garden beds.
About Agastache 'Astello Indigo'
Ideal for pots or borders, pollinator-friendly, thrives in sun or partial shade, long-lasting blooms.
- Balcony Friendly
- Low Maintenance
- Tolerates Most Light
- Hardy Perennial
History of Agastache 'Astello Indigo'
Also known as giant hyssop or hummingbird mint, this variety won the Fleuroselect Gold Medal in 2012 for its exceptional beauty and reliable performance. It’s a magnet for beneficial insects, supporting garden biodiversity.
| Other Names | Giant hyssop 'Astello Indigo', Hummingbird mint 'Astello Indigo', Anise hyssop 'Astello Indigo', Wild hyssop 'Astello Indigo' |
|---|---|
| Pet/Baby Safe | Baby & Pet Safe. |
FAQs
Typically from mid to late summer, about 15 weeks after sowing. Harvest: Flowers from mid-summer; deadhead to prolong bloom. Flowering runs July to October. Watering: regular watering, keep soil moist but not waterlogged.
It prefers full sun but tolerates partial shade well. Grow it in full sun to partial shade, well-drained soil.
Yes, it thrives in containers with good drainage. It is suited to cottage gardens, pollinator-friendly borders, pots and shade-tolerant flower beds. This is a perennial, so one sowing keeps going year after year rather than needing to be repeated each spring.
Yes — this is a straightforward packet to give, and what makes it work as a gift is mostly timing. Sowing runs February to May, so a packet given inside that window can go straight in, and one given outside it keeps perfectly well until the season comes round.
There are approximately 10 seeds in the packet. On effort it looks after itself, which matters if you are giving it to someone new to growing. It suits cottage gardens, pollinator-friendly borders, pots and shade-tolerant flower beds, so it works for a small space as well as a garden.
Reviews
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