Agastache Astello Indigo

A hardy perennial that flowers in the first year from an early sowing. Dense, rounded plants that produce a mass of flowering spikes. Can be grown as an annual and used for containers and bedding.

How to Sow and Grow

  • Sow Between: February to April
  • Flowering Months: June to October
  • Indoors Sowing Guide: Sow indoors to flower the same year, 0.5cm deep, in a tray of compost.
  • Water well and place on a warm windowsill.
  • A Temperature of 15-20oC is ideal.
  • Keep moist. Seedlings usually appear in 14-28 days.
  • Transplant seedlings 5cm apart to other trays when large enough to handle.
  • Gradually accustom young plants to outside conditions (avoid frosts), before planting out 25cm apart when frosts are over.
  • Soil Type: Well drained
  • Sun Level: Full sun
  • Hints & Tips: Remove dead flower heads to prolong flowering. Will attract beneficial insects into the garden


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