Black Hollyhock is part of the Alcea genus and its scientific name is Alcea rosea nigra.
rich, shiny blossoms
Short-lived perennials, may require replanting every few years.
This variety typically blooms in the following colours: Pansy purple.
A type of flowering ornamental / flower, it mainly grows as a perennial plant - which means it typically grows best over a long period (from 3 years+).
Normally reaching to a mature height of 3.25 feet (1.00 metres). Expect blooming to occur in mid summer.
This plant info is provided by the myfolia gardener's wiki. All details about Black Hollyhock have been kindly provided by our members.
Black Hollyhock likes a position of full sun and remember to apply water fairly sparingly. Use Zone 5 - Zone 10 as your guideline for the appropriate climate for this plant. Black Hollyhock requires a soil ph of 6.1 - 7.8 meaning it does best in weakly acidic soil - weakly alkaline soil.
See our list of companion Plants for Black Hollyhock to see which plants you should plant in close proximity to encourage growth.
By our calculations*, you should look at sowing Black Hollyhock about 14 days after your last frost date .
Seed viability is five years.
These estimates for how long Black Hollyhock takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average 56 days | Min 3 days | Max 361 days (9)
Average 46 days | Min 20 days | Max 80 days (7)
Average days | Min days | Max days (0)
Our when to plant Black Hollyhock estimates are relative to your last frost date.