Spike bigleaf hydrangea
Hydrangea macrophylla 'Spike'
USDA zones5 to 9
SunHandles full sun to full shade
WaterHandles moderate to wet soil
Sizeup to 4 feet tallup to 4 feet wide
- Growth rate
- Rapid
- Habit
- Mounding
- Bloom season
- Summer
- Bloom color
- Blue
- Foliage color
- Green
- Soil types
- Sand, loam, clay
- Soil pH
- Acidic for blue flowers (pH 4.5-5.5)
- Toxicity
- Toxic to dogs, toxic to cats, toxic to horses
Garden uses
Notes
'Spike' bigleaf hydrangea (Hydrangea macrophylla 'Spike') is a shrub for borders, cut flowers, and containers. It is hardy to USDA zone 5, or down to -20°F (-29°C). This plant likes full sun to full shade and average to wet, sandy, loamy, or clay soil. Blue flowers open from early to late summer, and acidic soil keeps them blue. Deer rarely make it their first choice. Keep pets away from it, since it is toxic to them.
Pairs well with Astilbe, Japanese forest grass, Siebold's hosta, and Fringed bleeding heart.