St. John's Wort (Hypericum calycinum)

Common names:
Give a thumbs up St. John's Wort
Give a thumbs up Aaron's Beard
Give a thumbs up Creeping St. John's Wort
Give a thumbs up Rose of Sharon

General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Mesic
Dry Mesic
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 10b
Plant Height: 12 inches
Plant Spread: 3-4 feet, but spreads infinitely by stolons
Flowers: Showy
Flower Color: Yellow
Flower Time: Summer
Late summer or early fall
Underground structures: Rhizome
Suitable Locations: Xeriscapic
Uses: Erosion control
Medicinal Herb
Will Naturalize
Wildlife Attractant: Bees
Resistances: Tolerates dry shade
Drought tolerant
Propagation: Seeds: Self fertile
Propagation: Other methods: Division
Stolons and runners
Pollinators: Self
Various insects
Miscellaneous: Tolerates poor soil


Honey Bees in the Garden:  JulyHoney Bees in the Garden: July
July 6, 2011

Independence Day and the beginning of the hottest days of summer, the Dog Days, are the major events in July. Gardeners and honey bees are trying to keep cool and harvesting food.

(Full article25 comments)
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Posted by Mindy03 (Delta KY) on May 9, 2012 6:05 PM

Valuable source of pollen for honey bees.

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Posted by zuzu (Northern California - Zone 9a) on May 29, 2014 11:53 PM

I don't know whether this plant is invasive everywhere, but it takes a lot of defensive work in my zone 9 garden to ward off a major invasion by the St. John's Wort growing on my neighbor's property.

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Posted by Catmint20906 (Maryland - Zone 7a) on Aug 23, 2014 7:37 PM

St. John's Wort (Hypericum calycinum) attracts a variety of native bees, including leafcutter, green sweat, sweat, and bumble bees. St. John's Wort also attracts beneficial insects to the garden, such as syrphid flies and banded long-horn beetles, which feed on a variety of common garden pests. This plant has not spread at all in my zone 7a garden, where it is planted in full sun. It may prefer drier soil than the soil common in our area.

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Plant Events from our members
aspenhill On June 10, 2019 Obtained plant
Southern States - qty 2
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Discussion Threads about this plant
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Is this Japanese Honeysuckle? by MuddySusan Aug 6, 2019 3:46 PM 15
Hardy Edible Evergreens by EvergreenMike Jun 7, 2017 2:00 PM 131
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