Sassy Summer Sunset Yarrow

Achillea 'Sassy Summer Sunset' is an upright, sturdy-stemmed yarrow selected for abundant dark orange flower clusters that mature to yellow. Its full-sun habit, warm changing color, and pollinator-friendly blooms suit sunny perennial borders and cut-flower plantings. [Walters Gardens cultivar profile](https://www.waltersgardens.com/variety.php?ID=ACHSN) · [Darwin Perennials profile](https://www.darwinperennials.com/Products/Details/?phid=000408393005424). ## Garden use and character Walters Gardens lists this cultivar in the Sassy Summer Collection and describes larger orange flower heads aging to yellow above green foliage. Its flat flower clusters offer landing places for visiting pollinators. The breeder reports a mature garden size of about 30–36 inches tall and 30–32 inches wide, with hardiness in USDA zones 3–8. ## Flowering and placement The cultivar flowers in summer. The plant patent describes flowering beginning in late June and continuing for about four weeks, while the breeder notes that timing shifts with local conditions. [Patent transcription](https://www.hort.net/pedia/patent/grant/31412/). Give it full sun and well-drained soil. Allow room for its upright clump and avoid persistently wet ground. Once established, the cultivar is listed for light water needs and tolerance of heat and dry periods. ## Cultivar and patent Walters Gardens identifies 'Sassy Summer Sunset' as its cultivar and breeder; the issued U.S. plant patent is PP31412, dated January 28, 2020. The patent description records the orange-to-yellow flower change and sturdy, branched stems. ## Maintenance Water new plantings while they establish, then adjust irrigation to rainfall and soil drainage. Remove spent flower stems if a tidier appearance is desired. Do not treat the patent's four-week observation as a guaranteed bloom duration in every climate.