15-18" x 18-24" wide, (cutting propagated). An exciting new hybrid form of Coreopsis with unusually shaped golden-yellow fluted petals, 'Jethro Tull' is a perennial you'll want for its compact growing habit and long season of bloom. A cross between Coreopsis auriculata 'Zamphir' and Coreopsis grandiflora 'Early Sunrise', this plant needs a lean, well-drained soil in full sun for best garden performance. I plant it with pink or magenta Delosperma for a sensational, long blooming, low care pairing. Zones 5-9.