Briggadoon St. John's Wort
Hypericum calycinum 'Briggadoon'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Groundcover
Height
12 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate, drought-tolerant once established
Humidity
Average garden humidity
Lifespan
Perennial
Native To
Europe and Asia
Toxicity
Mildly toxic if ingested
The Story
Plant Bio
Hypericum calycinum 'Briggadoon' is a low-growing evergreen shrub with dense, spreading habit, featuring bright green, ovate leaves and vibrant yellow flowers that bloom profusely in summer. This cultivar is distinguished by its abundant, large, double yellow flowers and its vigorous ground-covering growth, making it ideal for erosion control and ornamental landscaping.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Select a well-drained site with full sun exposure.
- Tuck seeds or cuttings into soil, water thoroughly.
- Mist cuttings regularly to maintain humidity for 4 weeks.
- Apply a balanced fertilizer in early spring.
- Prune lightly after flowering to maintain shape.
- Mulch around plants to retain moisture and suppress weeds.
Pro Tip
Ensure good drainage to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water during prolonged dry periods 🌱
- Prune after flowering to encourage bushy growth
- Fertilize annually with a balanced fertilizer
- Mulch to conserve moisture
Don't
- Avoid overwatering, which can cause root rot ❌
- Don’t prune in late fall or winter
- Avoid heavy fertilization in summer
- Don’t plant in poorly drained soil
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Briggadoon St. John's Wort questions
What zones can Briggadoon St. John's Wort grow in?
Briggadoon St. John's Wort is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Briggadoon St. John's Wort deer resistant?
Yes — Briggadoon St. John's Wort is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Briggadoon St. John's Wort bloom?
Briggadoon St. John's Wort typically blooms in late spring through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Briggadoon St. John's Wort need full sun?
Briggadoon St. John's Wort does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Briggadoon St. John's Wort drought tolerant?
Yes — once established (usually after the first full season), Briggadoon St. John's Wort handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Hypericum to compare
Hypericum frondosum Goldmound
Hypericum frondosum
Great St. John's Wort
Hypericum ascyron
Variegated Hypericum
Hypericum patulum 'Hidcote Variegated'
Shrubby St. Johnswort
Hypericum prolificum
Kalm's St. John's Wort
Hypericum perforatum 'Sunny Boulevard'
Kalm's St. John's Wort
Hypericum kalmianum
Keep exploring
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Grow Briggadoon St. John's Wort with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
