Geranium, Hardy Geranium, Meadow Cranesbill 'Plenum Caeruleum'

Geraniumpratense

Family
Geraniaceae (jer-ay-nee-AY-see-ee)
Genus
Geranium (jer-AY-nee-um)
Species
pratense (pray-TEN-see)
Synonym
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Height
24-36 in. (60-90 cm)
Spacing
18-24 in. (45-60 cm)
Hardiness
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
N/A
Bloom Color
Dark Blue
Blue-Violet
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow after last frost
From seed; germinate in a damp paper towel
Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Regional

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Gardener's Notes:

1
positive
0
neutral
0
negative
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| October 2005 | positive

Beautiful, almost iridescent double purple/blue flowers. This is said to be sterile, but I have heard reports of successful hand pollinat...Read More

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