South Portland Call for today’s hours 207-772-0415 Westbrook Call for today’s hours 207-887-8010 20% off perennials until november 1st
Photo of Hollyhock ‘Blacknight’ coming soon

Hollyhock ‘Blacknight’

Alcea 'Blacknight' · See all Alcea

Hollyhock ‘Blacknight’ is a full-sun to part-sun, long-blooming perennial hardy to zone 3; we sell it in 1-gallon pots for $11.99 at both stores.

Height & spread60–72 in tall, 18–24 in wide
SunFull sun, Part sun
Soil moistureAverage
HardinessUSDA zones 3–9
Bloom seasonSummer
Flower colorBlack/purple
AttractsPollinators, Butterflies
Pot sizePrice
1GAL$11.99

Call South Portland or Westbrook to check availability.

Availability may change and prices are subject to change.

About this plant

Alcea ‘Blacknight’ is a striking hollyhock that thrives in full to part sun, producing towering spikes of deep black-purple single blooms that create dramatic vertical accents in cottage and pollinator gardens. This tall perennial blooms throughout summer, attracting hummingbirds and bees while adding old-fashioned charm to borders and fence lines. Gardeners in Yarmouth value its impressive height and unique dark coloration that stands out against lighter-colored plantings. Provide well-drained soil and consider staking in windy locations to support the tall flower stalks laden with richly colored blossoms.

Good for

Questions about Blacknight hollyhock

How much sun does Blacknight hollyhock need?

Blacknight hollyhock grows best in full sun to part sun.

Is Blacknight hollyhock hardy in Maine?

Yes. It’s hardy to USDA zone 3, and Greater Portland is zone 5b–6a, so it comes back reliably each year.

How tall does Blacknight hollyhock get?

Blacknight hollyhock grows 60–72 in tall and 18–24 in wide.