Aaron&

Aaron's Beard, St. John's Wort

Hypericum calycinum

This spreading perennial bears yellow flowers in summer.

  • Yellow flowers are produced in summer, providing colour through the bloom season.
  • Spreading clump, reaching 40 cm at maturity; divide every three to four years to maintain vigour.
  • Best in full sun with average, dry, well-drained soil.
Size
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Plant Characteristics

Sunlight
Full sun
Soil Moisture
Well-drained, Dry, Average
Drought Tolerant
✓
Hardiness Zone
5 – 5
Mature Height (meters)
0.2 – 0.4
Mature Spread (meters)
0.45 – 0.6
Growth Rate
Medium
Flower Colour
Yellow
Foliage Colour
Green
Bloom Time
Summer
Habit
Spreading
Deer Resistant
✓
Rabbit Resistant
✓
Pollinator Friendly
✓
Landscape Uses
Border, Rock garden
Growing & Maintenance Tips
Grows best in an average to sandy, well-drained soil, in full sun and once established tolerates most conditions. The plant can be temperamental in our zone and should be grown in a sheltered location. Spreads by underground stolons and does not have an invasive habit in Ontario. Evergreen in warmer climates, however, in Ontario,H. calycinumwill most likely have some tip dieback in spring.
Notes
All parts of this plant are poisonous. Touching the plant is not a problem. Ingesting berries, flowers, or leaves can lead to skin photosensitivity.

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