1 More than 3 million people died of COPD in 2012, which is equal to 6% of all deaths globally that year. 2  More than 90% of COPD deaths occur in low- and middle-income countries.  The primary cause of COPD is tobacco smoke (through tobacco use or second-hand smoke).
Hollyhock, Alcea rosea, is a summer blooming biennial that has an upright habit with thick sturdy stems. They are winter hardy to zone 3. Zones 3 to 8 begin blooming mid to late summer. In zones 9 to 10, young plants are set out in fall and bloom early spring through summer. Hollyhocks are drought-resistant.
Yellowing Leaves on Hollyhocks. The showy flowers of the hollyhock attract butterflies and hummingbirds. Hollyhocks (Alcea rosea) are technically biennials that grow throughout U.S. Department of Agriculture plant hardiness zones 2 through 10, although they self-seed so readily that they are generally treated as perennials.