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Hypericum, St. John's Wort, St. Johnswort 'Silvana'

Hypericumcerastoides

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Hypericum cerastoides by killdawabbit
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Family
Hypericaceae (hy-PER-ee-KAY-see-ee)
Info
Genus
Hypericum (hy-PER-ee-kum)
Info
Species
cerastoides (ser-as-TOI-deez)
Info
Synonym
Sun Exposure
Full Sun
Foliage

Unknown - Tell us

Height
under 6 in. (15 cm)
Spacing
6-9 in. (15-22 cm)
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)
Danger

Unknown - Tell us

Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Other Details
Category
Alpines and Rock Gardens
Groundcovers
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Blue-Green
Where to Grow

Unknown - Tell us

Bloom Characteristics

Unknown - Tell us

Bloom Size

Unknown - Tell us

Other details

Unknown - Tell us

Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information

Unknown - Tell us

Propagation Methods
From seed; sow indoors before last frost
Seed Collecting

Unknown - Tell us

Regional

This plant is said to grow outdoors in the following regions:

Christiana, Tennessee

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killdawabbit
Christiana, TN (Zone 6b) | April 2011 | positive

This is fully hardy here in z6b. (see pic at right)

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