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
Hypericum glaucum
Hypericum rosmarinifolium
Hypericum sessiliflorum
Sun Exposure
Full Sun
Foliage
Evergreen
Deciduous
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)
Danger
N/A
Bloom Color
Bright Yellow
Bloom Time
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
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
Foliage Color
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
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
Regional

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Gardener's Notes:

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positive
1
neutral
0
negative
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Sebring, FL (Zone 9b) | February 2005 | neutral

Hypericum myrtifolium is found mostly in areas of grass and sedge dominance and seasonal inundation (wet prairies, wet pine savannas, out...Read More

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