 | Black Hollyhock Seeds (Alcea rosea nigra). Black Hollyhock was described as early as 1629 by John Parkinson as being "of a darke red like black blood," an apt description for the large single flowers that grace this plant in June and July. This biennial or short-lived perennial will form large rosettes of round, hairy leaves by autumn, and will bloom the following summer.Sow seeds indoors 8-12 weeks before last frost date at 70 degrees F. To improve germination, pretreat seeds with cold, moist stratification... - Black Hollyhock Seeds (Alcea rosea nigra). |
