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Regal Pelargonium (UK), Martha Washington Geranium (US), Pansy Flowered Geranium
Pelargonium x domesticum 'Imperial'

Family: Geraniaceae (jer-ay-nee-AY-see-ee) (Info)
Genus: Pelargonium (pe-lar-GO-nee-um) (Info)
Species: x domesticum (doh-MESS-tik-um) (Info)
Cultivar: Imperial
Additional cultivar information:(PP11596)
Hybridized by Lemon
Registered or introduced: 1998
» View all varieties of Pelargoniums

Category:

Annuals

Tropicals and Tender Perennials

Height:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Spacing:

12-15 in. (30-38 cm)

Hardiness:

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

N/A

Bloom Color:

Purple

White/Near White

Bloom Time:

Blooms repeatedly

Foliage:

Herbaceous

Other details:

Average Water Needs; Water regularly; do not overwater

Suitable for growing in containers

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Patented

Propagation Methods:

From herbaceous stem cuttings

Seed Collecting:

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

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On May 18, 2007, onewish1 from Denville, NJ (Zone 6b) wrote:

First time trying these here in zone 6... says it can be overwintered indoors but needs a cooling period.