Southwest Plant of the Month – Tansy aster or Tahoka daisy – Machaeranthera tanacetifolia
|Plant Form||Flower||Plant Size||1′ x 1′|
|Plant Type||Annual||Water Usage||Low|
|Sunlight||Sun, Partial Shade||Colors||Purple|
Physical Description: Profuse lavender to purple 2″ ray flowers with yellow disk centers among finely dissected foliage. Blooms spring through summer.
Care and Maintenance: Needs well drained soil. Prolific reseeder becoming invasive with excess water.
Gardener’s Notes: Native to El Paso’s sand dune country. The attractive daisy-like flowers often appear on a succession of plants. To prolong the blooming season, remove spent plants to make way for new emerging replacements. M. canescens, Sand aster, is a more robust, larger leafed relative also found in sandy or rocky soils of El Paso with lovely purple flowers in the fall.
Plant information from Southwest Yard & Garden Plant Advisor.