Agastache 'Astello Indigo', is a brilliant agastache that received the 2012 Fleuroselect Gold Medal for its outstanding garden performance.  The lighter blue flowers burst out of indigo flowering bracts for a unique color contrast.  Tall columnar blooming spikes are borne on top of strong square stems for a long period in summer.  The foliage is a rich green, slightly serrate, and deliciously licorice scented.  There is no browning to the bracts so even after the flowers fade the blooming columns still look attractive.  Eventually, in fall the leaves turn gold and the ripe flowering heads turn amber as the songbirds feast on the seeds. Our favorite blue!  A favorite of songbirds, butterflies and other pollinators.
Mature Plant Size: 36" Tall, 24" Spread
Bloom Time: June - October
Light Exposure: Full Sun 
Soil Type/pH: Well-drained/6.0-7.5 
Hardiness Zones: 5-9
Fertilizer: If using compost apply an 1" at planting time and side dress annually in late fall or early spring.  If using a granular fertilizer(we recommend organic formulations) apply an all purpose formula in early spring annually.  It is only recommended to use liquid fertilizers when the growth is slow.
Container Size: 4.5" Pot