Photo by Melody

PlantFiles: Hardy Cranesbill
Geranium 'Anne Thomson'

Family: Geraniaceae (jer-ay-nee-AY-see-ee) (Info)
Genus: Geranium (jer-AY-nee-um) (Info)
Cultivar: Anne Thomson
Additional cultivar information: (aka Ann Thomson, Ann Thompson)

» View all varieties of Hardy Geraniums

One member has or wants this plant for trade.


12-18 in. (30-45 cm)

24-36 in. (60-90 cm)
36-48 in. (90-120 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)

Sun Exposure:
Sun to Partial Shade


Bloom Color:

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater

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:
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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to view:

By bonitin
Thumbnail #1 of Geranium  by bonitin

By bonitin
Thumbnail #2 of Geranium  by bonitin

By jamie68
Thumbnail #3 of Geranium  by jamie68

By bonniewong
Thumbnail #4 of Geranium  by bonniewong

By kniphofia
Thumbnail #5 of Geranium  by kniphofia


1 positive
1 neutral
No negatives

Gardeners' Notes:

Neutral coriaceous On Oct 17, 2014, coriaceous from ROSLINDALE, MA wrote:

Grown for its chartreuse/yellow new foliage, its magenta flowers (NOT violet/lavender) with a black center, its long season of bloom, and its rambling, weaving habit. Looks a lot like 'Ann Folkard', but it's said to be more heat tolerant, and performs better than 'Ann Folkard' in eastern North America. Easy to control, because the stems do not self-layer.

In 2005, the Royal Horticultural Society granted this cultivar its coveted Award of Garden Merit. []

In the Chicago Botanic Garden's hardy geranium plant evaluations (Z5b), this cultivar survived only two winters. []

Bred by Alan Bremner, it's a hybrid between G. psilostemon and G. procurrens.

Positive jamie68 On Jul 17, 2005, jamie68 from Vancouver, WA (Zone 8b) wrote:

As long as you grow 'Anne Thompson' where she can stretch out, and hug her neighbors....she will be happy, and so will you! Mine has, I mean stretched out to more than 4 ft in all directions!! But finding her cute little blooms here, there, and everywhere is OK by me....I like them surprising me....


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

Lexington, Virginia
Kalama, Washington
Vancouver, Washington

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