Zagreb Coreopsis Zagreb Coreopsis is a heat and drought tolerant perennial. It is a perfect plant for a very hot and dry locaon. Zagreb Coreopsis has radiant yellow blooms that are mesmerizing in mass. It can be sheared in late summer to promote an addional fall bloom. Aracts Buerflies. 12” - 18” Tall 12” - 18” Wide Perennial Full Sun Fast Growth Water Needs: Low Bloom Time: Summer Zones 3 - 9 (Coreopsis vercillata ‘Zagreb’)