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PlantFiles: Coral Bells, Alumroot, Coralbells, Alum Root
Heuchera 'Blackout'

Family: Saxifragaceae (saks-ih-frag-AY-see-ee) (Info)
Genus: Heuchera (HEW-ker-a) (Info)
Cultivar: Blackout
Additional cultivar information: (PP20613)
Hybridized by Scheys; Year of Registration or Introduction: 2007

» View all varieties of Heucheras

2 vendors have this plant for sale.

5 members have or want this plant for trade.


6-12 in. (15-30 cm)

12-15 in. (30-38 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Sun to Partial Shade

Bloom Color:

Bloom Time:
Mid Summer

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater
This plant is resistant to deer
Suitable for growing in containers

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
By dividing the rootball

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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2 positives
1 neutral
No negatives

Gardeners' Notes:

Positive mehitabel45 On Aug 11, 2013, mehitabel45 from Whidbey Island, WA (Zone 8b) wrote:

Really dark foliage if grown in the shade. This is the third year for this, and it bloomed beautifully, although the flowers are tiny, and white, and really don't add much to the enjoyment of the wonderful foliage. I think that the deer may have been munching on them a little recently. That was a surprise. They've ignored it for 2 years. It looks like it's ready to be divided this year. I'm excited, because it has been a pleasure in my shade garden. I'll be putting the division in good compost in partial shade near some silver fuzzy and lacy medium green foliage. Woohoo!

Positive beansandpenney On Mar 24, 2012, beansandpenney from Orchard Park, NY (Zone 5a) wrote:

I have several coral bell varieties in my afternoon shade garden, however I believe this one reseeds itself? It is planted next to a flagstone patio and as we speak, there are several Heuchera seedlings sprouting up between the cracks of the flagstone near where Blackout is planted. Has this plant or any other heuchera variety done this? Seems odd! Well, I'm going out to pot 'em up!

Neutral stormyla On Nov 24, 2009, stormyla from Norristown, PA (Zone 6b) wrote:

These Heuchera did not survive their first summer for me. They just dried up and died. They seemed to need more water than my others.


This plant has been said to grow in the following regions:

Dracut, Massachusetts
Royal Oak, Michigan
Orchard Park, New York
Coshocton, Ohio
Williamsburg, Ohio
Norristown, Pennsylvania
Wilkes Barre, Pennsylvania
Freeland, Washington
Kalama, Washington

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