Mammoth Mum
Chrysanthemum x morifolium 'Mammoth Mum'
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
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average humidity
Lifespan
Perennial
Native To
Cultivated hybrid
Toxicity
Toxic to pets if ingested.
The Story
Plant Bio
Chrysanthemum x morifolium 'Mammoth Mum' is a perennial flowering plant known for its large, showy daisy-like blooms and bushy, foliage-rich habit that creates a vibrant display in late summer to autumn. This cultivar is distinguished by its exceptionally large flowers, making it a popular choice for floral arrangements and garden displays, with good tolerance to varying weather conditions.
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 or cuttings into moist soil in early spring
- Keep soil consistently moist during growing season
- Place in full sun for best flowering, ensure good drainage
- Fertilize monthly with balanced fertilizer for vibrant blooms
- Pinch back stems to encourage bushier growth after flowering
- Mulch around base to retain moisture and suppress weeds
Pro Tip
Ensure well-draining soil and full sun for optimal flowering.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Deadhead spent blooms to promote new flowers
- Apply balanced fertilizer monthly during active growth
- Mulch to conserve moisture and regulate soil temperature
- Prune to maintain shape after flowering
Don't
- Overwater, which can cause root rot ❌
- Allow soil to dry out completely between watering
- Avoid heavy pruning in late fall ❌
- Plant in poorly drained soil ❌
- Neglect pest and disease control
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Pinch | ||||||||||||
| 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
Mammoth Mum questions
What zones can Mammoth Mum grow in?
Mammoth Mum 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 Mammoth Mum deer resistant?
Yes — Mammoth Mum is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Mammoth Mum bloom?
Mammoth Mum typically blooms in late summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Mammoth Mum need full sun?
Mammoth Mum does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Chrysanthemum to compare
Shasta Daisy
Chrysanthemum leucanthemum 'Becky'
Garden Mum
Chrysanthemum x hybrida 'Christy'
Shasta Daisy
Chrysanthemum leucanthemum 'May Queen'
Mammoth Chrysanthemum
Chrysanthemum x morifolium 'Mammoth'
Mammoth Garden Mum
Chrysanthemum x morifolium 'Hardy Mammoth Mum Collection'
Small Wonder Chrysanthemum
Chrysanthemum x morifolium 'Small Wonder'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Mammoth Mum 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.
