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Hypericum, Kalm's St. John's Wort, St. Johnswort 'Blues Festival'

Hypericumkalmianum

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Family

Hypericaceae (hy-PER-ee-KAY-see-ee)

Info

Genus

Hypericum (hy-PER-ee-kum)

Info

Species

kalmianum (kal-mee-AH-num)

Info

Synonym

Sun Exposure

Light Shade

Partial to Full Shade

Foliage

Deciduous

Height

24-36 in. (60-90 cm)

Spacing

24-36 in. (60-90 cm)

36-48 in. (90-120 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)

Danger

Unknown - Tell us

Bloom Color

Bright Yellow

Bloom Time

Mid Summer

Other Details

Gardener's Notes:

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2bloom

Arlington, VA | July 2019 | neutral

For those who have this cultivar, how often do you see butterflies or bees on it? Thanks.

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Hypericum, Kalm's St. John's Wort, St. Johnswort 'Blues Festival'

Hypericumkalmianum

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