- Self-seeding biennial grows to 6 feet tall
- Deep red flowers look almost black
- Single blossoms
- Good for landscaping and ornamental gardens
(Alcea rosea) This single hollyhock was described in 1629 by English botanist John Parkinson as being “of a darke red like blackblood.” It appears black on overcast days, but will have a hint of red in bright sun. Plant next to a white fence for a spectacular contrast. Self-seeding biennial, 5-6' tall.
Learn to Grow Black Hollyhock
Direct Seed: 1/8" Deep
Germination: 10-14 Days
Thin: 18-36" Apart
Light: Sun/Partial Shade
Instructions - Sow seeds outdoors one week before last frost. Give space to allow airflow, and grow in rich moist soil. Stake tall plants.