Blue Billow Hydrangea
Hydrangea macrophylla 'Blue Billow'
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Shrub
Height
42 inches
Width
54 inches
Light
Partial Sun, Shade
Zones
6, 7, 8, 9
Water
Medium moisture
Humidity
Prefers moderate to high humidity
Lifespan
10+ years
Native To
Japan
Toxicity
All parts of the plant are toxic to pets and humans if ingested.
The Story
Plant Bio
A deciduous, spreading, lacecap-type hydrangea with a mounded habit. Features flattened flower clusters in summer, composed of small, fertile, deep blue inner flowers and a ring of larger, sterile, lighter blue ray florets. Flower color is dependent on soil pH. A notably hardy and reliable lacecap cultivar, 'Blue Billow' is distinguished by its graceful, spreading, billowy habit. It is a prolific bloomer, producing abundant flattened flower heads that create a sea of blue in the summer garden.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck young plants into well-prepared, moist soil in early spring.
- Water regularly to keep soil consistently moist, especially during dry spells.
- Mist cuttings frequently to maintain humidity and promote root development.
- Fertilize with a balanced, acid-loving plant fertilizer in spring and summer.
- Prune after flowering to shape the plant and remove dead or weak stems.
- Mulch around the base to retain moisture and regulate soil temperature.
Pro Tip
Plant hydrangeas in morning sun and afternoon shade for best blooms and health.
Keep It Thriving
Care Guide
Do
- Water deeply once a week, more during hot weather 🌱
- Prune dead or damaged stems after flowering
- Apply mulch to conserve moisture and suppress weeds
- Feed with acid-loving fertilizer in spring and summer
- Provide partial shade in hot climates
Don't
- Don't let soil dry out completely ❌
- Avoid heavy pruning in late summer or fall
- Don't plant in full sun in hot regions
- Avoid over-fertilizing which can cause lush foliage but few blooms
- Do not forget to check soil pH for optimal color
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup | ||||||||||||
| Winter Prep |
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
Blue Billow Hydrangea questions
What zones can Blue Billow Hydrangea grow in?
Blue Billow Hydrangea is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Blue Billow Hydrangea deer resistant?
Not reliably. Deer may browse Blue Billow Hydrangea, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Blue Billow Hydrangea bloom?
Blue Billow Hydrangea typically blooms in summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Blue Billow Hydrangea need full sun?
Blue Billow Hydrangea does best in part shade.
More Hydrangea to compare
Incrediball Hydrangea
Hydrangea arborescens 'Incrediball'
Limelight Hydrangea
Hydrangea paniculata 'Limelight'
Bobo Hydrangea
Hydrangea macrophylla 'Bobo'
Little Lime Hydrangea
Hydrangea quercifolia 'Little Lime'
Bloomstruck Hydrangea
Hydrangea macrophylla 'Bloomstruck'
All Summer Beauty Hydrangea
Hydrangea macrophylla 'All Summer Beauty'
Keep exploring
Explore the genus
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Hardy in your zone?
Grow Blue Billow Hydrangea 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.
