Hibiscus, Rose of Sharon, Shrub Althea 'Helene'

Hibiscussyriacus

Family
Malvaceae (mal-VAY-see-ee)
Genus
Hibiscus (hi-BIS-kus)
Species
syriacus (seer-ee-AK-us)
Synonym
Spacing
8-10 ft. (2.4-3 m)
Hardiness
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
Sun Exposure
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)
Bloom Color
Sun to Partial Shade
Bloom Time
Foliage
Pink
White/Near White
Other Details
Other details
Mid Summer
Late Summer/Early Fall
Propagation Methods
Deciduous
This plant is resistant to deer
Seed Collecting
Soil pH requirements
From seed; direct sow outdoors in fall
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Patent Information
Foliage Color
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Bloom Characteristics
Water Requirements
Where to Grow
Regional

This plant is said to grow outdoors in the following regions:

Tuscaloosa, Alabama

Chowchilla, California

Placerville, California

Sherman, Connecticut

Chicago, Illinois

Plainfield, Illinois

Winamac, Indiana

Cleveland, Ohio

Dundee, Ohio

Oklahoma City, Oklahoma

Richmond, Texas

Spicewood, Texas

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Gardener's Notes:

3
positives
0
neutral
0
negative
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V
(Zone 8a) | August 2005 | positive

Beautiful plant. I have two which I'm training into standards. Low maintenance, blooms profusely from May-Dec.
Sep 2009. Stil...Read More

M
BeachTown, CA (Zone 10a) | May 2005 | positive

I purchased this plant last year and love it! In my zone-7b backyard, it was a prolific bloomer all last summer in white hibiscus-flower...Read More

O
Dundee, OH (Zone 5b) | June 2004 | positive

Grows easily from seed, can be pruned to any size you would like to keep it. Blooms later in season when all other shrubs seem to have quit blooming.

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