Blue Mist Spiraea, Bluebeard 'Grand Bleu'

Caryopteris x clandonensis

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Caryopteris (kar-ee-OP-ter-iss) (Info)
Species: x clandonensis (klan-don-EN-sis) (Info)
Cultivar: Grand Bleu
Additional cultivar information:(PP17837; aka Inoveris, Gran Blue, Grand Blue Inoveris)
Hybridized by Cadic
Registered or introduced: 2007




Foliage Color:


Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Suitable for growing in containers


24-36 in. (60-90 cm)


24-36 in. (60-90 cm)


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)

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

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

Sun Exposure:

Full Sun


Unknown - Tell us

Bloom Color:

Dark Blue

Bloom Time:

Late Summer/Early Fall





This plant is resistant to deer

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

Seed Collecting:

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


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

Dublin, California

Hanna City, Illinois

Iowa City, Iowa

Waverly, Iowa

Portland, Maine

Irwin, Pennsylvania

show all

Gardeners' Notes:


On Apr 28, 2015, boisdarc from Atlanta, GA (Zone 8a) wrote:

I have ordered three of these plants from the sole source I could find them; not from Oklahoma but Virginia. I am looking for instructional information, because I would like to introduce these plants to my area. Please let me have any input you can provide. I try not to introduce new but harmful plants. Thanks.


On May 10, 2007, fdetroch from Merelbeke
Belgium (Zone 8a) wrote:

Very attractive small shrub. Grows very well (yet sheltered) in Belgium (zone 8).
'Grand Bleu' (aka 'Inoveris') is the result of in vitro mutagenesis by INRA, France


On May 8, 2007, braun06 from Peoria Heights, IL (Zone 5b) wrote:

it is a trouble free plant. It will die down to the snowline in zone 5 for most winters. With dieback expect it still to reach 3'x3' every season. I see no difference between this cultivar and most other blue mist shrubs.


On Mar 17, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Caryopteris clandonensis 'Grand Bleu' BLUE MIST SHRUB Dec (z5) (Cut,Hon,Bfly)
The same DEEP blue flowers as 'Heavenly Blue' but over a longer summer bloom period and on a plant half the size! (to 2-3'high & wide) EVERYone can enjoy it even in a container or small yard. Sun/Med/GDr


On Sep 4, 2006, saya from Heerlen
Netherlands (Zone 8b) wrote:

In a more mild climates it is a small (60 cm) deciduous shrub, but in more colder climates it will die down to its more behaving like a herbacious perennial. It flowers on the new first year growth. Because of its size Gran Blue is suitable to grow in a container.