We originally grew this wonderful vivid free blooming bat flower as an annual. But after years of growing it in the ground we’ve found that its remarkably root hardy. To 20″ tall forming a semi-woody shrublet it produces sprays of small but vivid flowers from May to frost. Full sun and rich, WELL DRAINED soil in the ground and patience- it takes a while to come back in spring- usually not until truly hot days appear in May. Once up- with regular supplemental water it zooms and blooms and resumes its previous stature quickly. Good drainage in a hot position seems to be the key as a perennial. Mine has happily lived in the ground in my garden in North Portland for 7 years- returning from the coldest winters. It will freeze to the ground below about 28ºF- but it always returns. Great seasonal plant in containers and it will draw hummingbirds from 5 counties around. Nice plant. Blooms continuously without intervention. My kind of plant.