11 named cultivars
‘Incrediball’Incrediball Hydrangea
‘Annabelle’Annabelle Hydrangea Smooth Hydrangea
‘Ruby Slippers’Ruby Slippers Oakleaf Hydrangea
‘Invincibelle Spirit II’Invincibelle Spirit II Hydrangea
‘Invincibelle Limetta’Invincibelle Limetta Hydrangea
‘Invincibelle Wee White’Invincibelle Wee White Hydrangea
‘Incrediball Blush’Incrediball Blush Hydrangea
‘Wee White’Wee White Smooth Hydrangea
‘Invincibelle Ruby’Invincibelle Ruby Hydrangea
‘Invincibelle Lace’Invincibelle Lace Hydrangea
‘Invincibelle Lace Smooth’Invincibelle Lace Hydrangea
The Story
Plant Bio
Hydrangea arborescens, commonly known as smooth hydrangea, is a deciduous shrub that produces large, round clusters of white flowers that can change to greenish or pink hues as they mature.
This species is particularly known for its ability to thrive in shaded areas and its resilience in different soil types.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Shrub
Height
48 inches
Width
48 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Prefers moderate to high humidity
Lifespan
Many years with proper care
Native To
North America
Toxicity
Toxic if ingested
Planting
How to Grow
- Tuck young plants into well-drained, rich soil in early spring.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Water deeply once a week during dry spells for healthy growth.
- Fertilize with a balanced, slow-release fertilizer in spring and mid-summer.
- Prune dead or weak stems in late winter to encourage new growth.
- Mulch around the base to retain moisture and suppress weeds.
Pro Tip
Plant hydrangeas in morning sun with afternoon shade for optimal blooms.
Keep It Thriving
Care Guide
Do
- Water consistently, especially during dry periods 🌱
- Prune annually to shape and remove dead wood
- Apply mulch to conserve moisture and regulate soil temperature
- Fertilize in early spring and midsummer
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t prune in late summer or fall, as it may reduce next year’s blooms
- Never plant in poorly drained soil
- Avoid direct, harsh afternoon sun in hot climates
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Harvest | ||||||||||||
| Mulch | ||||||||||||
| 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
Smooth Hydrangea questions
What zones can Smooth Hydrangea grow in?
Smooth Hydrangea 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 Smooth Hydrangea deer resistant?
Not reliably. Deer may browse Smooth Hydrangea, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Smooth Hydrangea bloom?
Smooth Hydrangea 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 Smooth Hydrangea need full sun?
Smooth 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'
Annabelle Hydrangea Smooth Hydrangea
Hydrangea arborescens 'Annabelle'
Keep exploring
Explore the genus
Grow Smooth 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.