Chinese Plumbago
Ceratostigma willmottianum

Family: Plumbaginaceae (plum-baj-i-NAY-see-ee) (Info)
Genus: Ceratostigma (ser-uh-toh-STIG-muh) (Info)
Species: willmottianum (wil-mot-ee-AH-num) (Info)

Category:

Shrubs

Height:

24-36 in. (60-90 cm)

Spacing:

36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)

Hardiness:

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

Danger:

Unknown - Tell us

Bloom Color:

Medium Blue

Bloom Time:

Late Summer/Early Fall

Mid Fall

Foliage:

Grown for foliage

Herbaceous

Smooth-Textured

Good Fall Color

Other details:

Average Water Needs; Water regularly; do not overwater

This plant is resistant to deer

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

By simple layering

Seed Collecting:

Unknown - Tell us

Regional

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

Santa Rosa, California

East Haddam, Connecticut

Bushnell, Florida

Port Saint Lucie, Florida

Dayton, Ohio

Gardeners' Notes:

2
positives
1
neutral
0
negatives
RatingContent
Positive

On Jul 4, 2011, dave12122 from East Haddam, CT wrote:

A fantastic plant which is borderline hardy here. Needs a 1-2 ft. mulch of hay or shredded leaves from Nov.1st- April 1st to survive. Does not flower until early September, but then blooms until hard frost. The blooms are electric blue and stunningly gorgeous. Responds to heat and sun, this is not a shade tolerant plant like Ceratostigma plumbaginoides. Well worth a gamble, this is excellent on the south side of the house near the foundation for winter protection.

Positive

On Nov 4, 2009, purplesun from Krapets
Bulgaria (Zone 8a) wrote:

A perennial plant for me, with wonderfully blue flowers that remind me of forger-me-nots. This is a very showy plant in autumn when nothing else is in flower. I guess it could make an interesting combination with Garden Mums.

Neutral

On Aug 10, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:

Produces deep gentian blue flowers with white eyes from late summer to fall, while the blue-green leaves turn vivid crimson, creating a striking contrast.

A deciduous shrub from China, it is named for the famous British gardener, Miss Ellen Ann Wilmott.