Hypericum Species, Myrtleleaf St. Johnswort
Hypericummyrtifolium

Family: Hypericaceae (hy-PER-ee-KAY-see-ee)
Genus: Hypericum (hy-PER-ee-kum)
Species: myrtifolium (mir-tih-FOH-lee-um)

Synonym:Brathydium myrtifolium

Synonym:Hypericum glaucum

Synonym:Hypericum rosmarinifolium

Synonym:Hypericum sessiliflorum

Category
Perennials
Shrubs

Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

Sun Exposure
Full Sun

Foliage
Evergreen
Deciduous

Foliage Color
Blue-Green

Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

Spacing
36-48 in. (90-120 cm)

Hardiness
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)

Where to Grow

Danger
N/A

Bloom Color
Bright Yellow

Bloom Characteristics

Bloom Size

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

Other details

Soil pH requirements
4.5 or below (very acidic)
4.6 to 5.0 (highly acidic)
5.1 to 5.5 (strongly acidic)

Patent Information
Non-patented

Propagation Methods
From woody stem cuttings
From seed; direct sow outdoors in fall

Seed Collecting