Light Requirements for Japanese Spiraea
Understanding the light needs of your Japanese Spiraea is essential for healthy growth.
Light Requirements Overview
Light Needs: Full sun to partial shade
Ideal Light Conditions
Full sun (6–8 hours/day) in spring and summer; partial shade during intense summer heat.
Light Tolerance
Acclimate plants gradually to full sun; protect from harsh afternoon sun in hot climates; ensure adequate light indoors if grown as a container plant.
Quick Tips
Rotate container plants for even light exposure; use sheer curtains to filter intense sunlight; avoid placing near heat sources.
Placement Guide
Indoor Placement
- East window: Morning sun (gentle)
- West window: Afternoon sun (intense)
- South window: All-day sun (brightest)
- North window: Indirect light only
Outdoor Placement
- Consider sun path throughout day
- Check for shade from structures
- Account for seasonal changes
- Protect from harsh afternoon sun
Signs of Light Problems
Too Much Light
- Leaf scorch or brown patches
- Faded or bleached colors
- Wilting despite moist soil
- Crispy leaf edges
Too Little Light
- Leggy, stretched growth
- Small, pale leaves
- Slow or no growth
- Leaning toward light source
