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Thompson & Morgan Agastache Hybrida Astello Indigo - 1 Seed Packet

Not AvailableThompson & Morgan Agastache Hybrida Astello Indigo - 1 Seed Packet
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Indulge your senses with the marvellous mint-scented flowers of Agastache 'Astello Indigo'! These ...

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This seed packet of Agastache 'Astello Indigo' is ideal for gardeners seeking to add vibrant, long-lasting color and a delightful minty fragrance to their borders, containers, or wildlife gardens. Its deep blue flower spikes are highly attractive to pollinators, offering a key benefit of supporting local ecosystems. While a half-hardy perennial, it is often grown as an annual in colder climates, requiring specific overwintering care for perennial survival.

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Model Part Number23970
BrandThompson & Morgan

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FAQs

What is the best location for Agastache 'Astello Indigo'?

Agastache 'Astello Indigo' thrives in full sun and requires fertile, well-drained soil.

How long does it take for the seeds to germinate?

Germination typically takes between 30 to 90 days under the correct conditions of warmth and moisture.

Can I use the flowers or leaves in cooking?

Yes, both the flowers and leaves have a minty aroma and can be added to desserts like cakes or whipping cream for a hint of anise flavor.

Is this plant a perennial or an annual?

It is a half-hardy perennial. In milder climates, it can perennialize. In colder regions, it is commonly grown as an annual, though overwintering protection can help.

How often should I water my Agastache plants?

Water regularly, especially during dry periods, but ensure the soil does not become waterlogged. Good drainage is crucial.

Why are bees and butterflies attracted to this plant?

The plant produces deep blue, nectar-rich flower spikes that are highly appealing to pollinators.

How far apart should I plant them outdoors?

Space the plants approximately 60cm (24 inches) apart when planting outdoors to allow for their mature spread.

Troubleshooting

Seeds not germinating

Ensure consistent temperature (15-20°C) and light are provided. Check soil moisture is adequate but not excessive. Germination can be slow; patience is key.

Seedlings are leggy and weak

Provide more light and ensure they are not overcrowded. Transplant into slightly larger pots with good drainage.

Plant wilting despite watering

Check for waterlogged soil, which can cause root rot. Ensure the soil is well-drained. If outdoors, check for adequate drainage in the planting location.

Poor flowering

Ensure the plant is receiving at least 6-8 hours of direct sunlight per day. Lack of sun is the most common cause of poor flowering.

Plant dies back in winter

This is normal in colder climates where it's often grown as an annual. In milder areas, apply a thick mulch around the base or move pots to a frost-free location to encourage perennial survival.

Pros and Cons

Pros

  • Adds vibrant color and pleasant mint fragrance to the garden.
  • Excellent for attracting beneficial insects like bees and butterflies.
  • Versatile planting options for various garden styles.
  • Edible flowers and leaves offer culinary interest.
  • Provides long-lasting blooms throughout the summer and autumn.

Cons

  • May require overwintering or be treated as an annual in colder climates.
  • Germination can be slow and requires specific temperature conditions.
  • Needs full sun and well-drained soil for optimal growth.
  • Seed-grown plants can vary in exact characteristics.

Setup, Compatibility & Care

Sowing Seeds: Sow Agastache seeds indoors from February to April. Use a good quality seed compost, sowing seeds on the surface and covering lightly with compost or vermiculite. Maintain a temperature of 15-20°C (60-68°F). Keep the soil consistently moist but not waterlogged, and ensure light is not excluded.

Germination: Germination typically takes between 30 and 90 days. Keep seeds in a propagator or sealed in a polythene bag until germination occurs.

Transplanting Seedlings: Once seedlings are large enough to handle, transplant them into individual pots and grow them on in cooler conditions until they are strong enough for outdoor planting.

Hardening Off: Before planting outdoors, acclimatize the young plants to outdoor conditions gradually over 7 to 10 days.

Outdoor Planting: Plant outdoors after all risk of frost has passed. Choose a location in full sun with fertile, well-drained soil. Space plants approximately 60cm (24 inches) apart.

Care: Water regularly, especially during dry periods, but avoid overwatering. Deadhead spent flowers to encourage further blooming. In colder climates, Agastache 'Astello Indigo' is often treated as an annual. For perennial survival in milder regions, protect the base of the plant from hard frost by mulching or moving containers to a sheltered spot.

Compatibility: Suitable for borders, containers, gravel gardens, and wildlife gardens.