Marshmallow Yarrow
Achillea millefolium 'Marshmallow'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
24 inches
Light
Full Sun
Zones
4, 5, 6, 7, 8, 9
Water
Low to moderate
Humidity
Low
Lifespan
Perennial
Native To
Europe and Asia
Toxicity
Toxic to dogs, cats, and horses; can cause skin irritation
The Story
Plant Bio
Achillea millefolium 'Marshmallow' is known for its abundant clusters of feathery white flowers and aromatic green foliage. This cultivar has a unique compact form with delicate white blooms, making it ideal for borders and cut flowers.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings lightly once roots are established, around 4–6 weeks.
- Space plants 12–18 inches apart to allow airflow and growth.
- Water deeply during dry spells, especially in the first year.
- Fertilize with a balanced fertilizer in early spring to promote healthy growth.
- Deadhead spent flowers to encourage more blooms throughout summer.
Pro Tip
Plant in full sun for vigorous growth and abundant flowering.
Keep It Thriving
Care Guide
Do
- Water at the base to prevent fungal diseases 🌱
- Prune after flowering to maintain shape
- Mulch to conserve moisture and suppress weeds
Don't
- Avoid overwatering, which can cause root rot ❌
- Don’t fertilize excessively, as it may reduce flowering
- Refrain from planting in heavy, poorly-drained soil
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| 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
Marshmallow Yarrow questions
What zones can Marshmallow Yarrow grow in?
Marshmallow Yarrow 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 Marshmallow Yarrow deer resistant?
Yes — Marshmallow Yarrow is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Marshmallow Yarrow bloom?
Marshmallow Yarrow 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 Marshmallow Yarrow need full sun?
Marshmallow Yarrow does best in full sun (6+ hours).
Is Marshmallow Yarrow drought tolerant?
Yes — once established (usually after the first full season), Marshmallow Yarrow handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Achillea to compare
Red Velvet Yarrow
Achillea millefolium 'Red Velvet'
Common Yarrow
Achillea millefolium 'Sassy Summer Taffy'
Common Yarrow
Achillea millefolium 'New Vintage White'
Summer Pastels Yarrow
Achillea millefolium 'Summer Pastels'
Moonshine Yarrow
Achillea millefolium 'Moonshine'
Pink Grapefruit Yarrow
Achillea millefolium 'Pink Grapefruit'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Marshmallow Yarrow 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.
