Hypericum Species, Bushy St. John's Wort, St. Johnswort

Hypericumdensiflorum

Family
Hypericaceae (hy-PER-ee-KAY-see-ee)
Genus
Hypericum (hy-PER-ee-kum)
Species
densiflorum (den-see-FLOR-um)
Synonym
Brathys prolifica
Hypericum galioides
Hypericum glomeratum
Hypericum kalmianum
Hypericum prolificum var. densiflorum
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Deciduous
Smooth
Height
36-48 in. (90-120 cm)
Spacing
36-48 in. (90-120 cm)
Hardiness
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
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Perennials
Shrubs
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

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

Red Bank, New Jersey

Ithaca, New York

Andrews, North Carolina

Franklinton, North Carolina

Bucyrus, Ohio

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Gardener's Notes:

1
positive
0
neutral
0
negative
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Bucyrus, OH (Zone 6a) | May 2006 | positive

Bushy St. Johnswort is one of fifty-plus species of St. Johnswort found on the North American continent. According to the USDA, Bushy St...Read More

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