Compass Plant
Silphium laciniatum
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
72 inches
Width
36 inches
Light
Full Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic
The Story
Plant Bio
Silphium laciniatum, commonly known as compass plant, is a tall perennial with deeply lobed, fern-like leaves and bright yellow, sunflower-like flowers that bloom in late summer. This species is notable for its tall, upright growth habit and its ability to attract pollinators such as bees and butterflies, thriving in dry, well-drained soils.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
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Planting
How to Grow
- Tuck seeds into well-drained soil in early spring.
- Water regularly until established, about 6 weeks.
- Place in full sun for optimal growth.
- Mulch to retain moisture and suppress weeds.
- Divide clumps every 3-4 years in early spring.
- Support tall stems if necessary to prevent flopping.
Pro Tip
Ensure well-drained soil and full sun for best results.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Apply a balanced fertilizer in spring
- Remove spent flowers to encourage rebloom
Don't
- Avoid overwatering to prevent root rot ❌
- Do not fertilize late in the season
- Never disturb roots during peak flowering
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant | ||||||||||||
| Spring Cleanup | ||||||||||||
| Stake |
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
Compass Plant questions
What zones can Compass Plant grow in?
Compass Plant 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 Compass Plant deer resistant?
Yes — Compass Plant is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Compass Plant bloom?
Compass Plant typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Compass Plant need full sun?
Compass Plant does best in full sun (6+ hours).
Is Compass Plant drought tolerant?
Yes — once established (usually after the first full season), Compass Plant handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Compass Plant 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.
