Agastache - Astello Indigo
Indulge your senses with the fabulous mint-scented flower-spikes of Astello Indigo. The long-lasting, deep blue flower spikes are irresistible to bees and butterflies and make a fabulous addition to borders and containers. This attractive half-hardy perennial is ideal for gravel gardens and wildlife borders, although it is generally grown as an annual in colder areas. Height: 60cm. Spread: 30cm.
Culinary note: Add both flowers and leaves to cakes or whipping cream for a hint of anise flavour.
Sow Agastache seeds from February to April at 15-20C, on the surface of a good quality seed compost and cover with a fine sprinkling of compost or vermiculite. Keep the soil damp but not wet and do not exclude light. Place in a propagator or seal the seed tray inside a polythene bag until after germination, which usually takes 30-90 days. When seedlings are large enough to handle, transplant and grow them on in cooler conditions until large enough to plant outdoors. When Agastache plants are well grown and all risk of frost has passed, acclimatise them to outdoor conditions over 7 to 10 days. Transplant outdoors in full sun on fertile, well-drained soil at a distance of 60cm apart. Water regularly until plants are fully established. Deadhead faded Agastache flowers to encourage more blooms to be produced.