Geranium x magnificum Rosemoor
Geranium x magnificum 'Rosemoor'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
36 inches
Light
Full Sun, Partial Sun, Shade
Zones
4, 5, 6, 7, 8
Water
Moderate
Humidity
Average garden humidity
Lifespan
Perennial
Native To
Hybrid origin
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Geranium x magnificum 'Rosemoor' is a perennial herbaceous plant known for its mounding habit, deeply lobed foliage, and clusters of vibrant violet-blue flowers with prominent dark veins, blooming in late spring to early summer. This cultivar is distinguished by its exceptionally large, intensely colored flowers and its vigorous growth, making it a striking addition to borders and woodland gardens.
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds or divisions into well-prepared soil in early spring.
- Water thoroughly after planting to establish roots.
- Apply a balanced fertilizer in spring for healthy growth.
- Mulch around plants to retain moisture and suppress weeds.
- Deadhead spent blooms to encourage more flowering.
- Divide every 3–4 years in early spring for rejuvenation.
Pro Tip
Plant in well-drained soil with some organic matter for best results.
Keep It Thriving
Care Guide
Do
- Water regularly during dry periods 🌱
- Mulch to conserve moisture
- Deadhead to prolong flowering
- Divide in early spring
Don't
- Avoid overwatering in winter ❌
- Don’t plant in poorly drained soil
- Refrain from heavy pruning during flowering
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup |
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
Geranium x magnificum Rosemoor questions
What zones can Geranium x magnificum Rosemoor grow in?
Geranium x magnificum Rosemoor is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Geranium x magnificum Rosemoor deer resistant?
Yes — Geranium x magnificum Rosemoor is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Geranium x magnificum Rosemoor bloom?
Geranium x magnificum Rosemoor typically blooms in late spring to early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Geranium x magnificum Rosemoor need full sun?
Geranium x magnificum Rosemoor does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Geranium to compare
Bigroot Geranium
Geranium macrorrhizum
Wild Geranium
Geranium maculatum
Cranesbill 'Rozanne'
Geranium x magnificum 'Rozanne'
Showy Cranesbill
Geranium x magnificum 'Bevan's Variety'
Azure Rush Geranium
Geranium incanum 'Azure Rush'
Cranesbill 'Orion'
Geranium maculatum 'Orion'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Geranium x magnificum Rosemoor 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.
