Euphorbia 'Ascot Rainbow'
Euphorbia 'Ascot Rainbow' is a striking evergreen perennial grown for its vividly variegated foliage which features green leaves edged in creamy yellow with pink to red tinges during cooler months. Upright and architectural, it produces clusters of chartreuse flowers with reddish centers in spring. Its unique color palette provides multi season interest and contrasts well in modern and mixed border designs.
Height & Spread: 18 - 24 in x 18 - 24 in
Bloom Time: Spring to early summer
Light Requirements: Full sun to part sun
Soil Preference: Well drained, dry to average soils
Watering Needs: Low; drought tolerant once established
Deer Resistance: Highly resistant due to bitter, toxic sap
Native Status
This cultivar originates from Euphorbia species native to southeastern Europe and Asia. While not native to North America, it performs reliably in ornamental gardens and containers across temperate zones.
WILDLIFE & INSECTS
Butterflies
- Attracts early season butterflies such as Painted Ladies and Red Admirals with its spring flower bracts.
Bees
- Visited by solitary bees and honeybees seeking pollen from its colorful floral structures in spring.
Moths
- May support some nocturnal pollinators drawn to the open flower structure especially in mixed border habitats.
Beneficial Insects
- Provides habitat and shelter for predatory insects such as parasitic wasps and beetles that patrol garden beds.
Spacing & Landscape Use
Spacing Recommendations:
- Space 18 - 24 in apart to allow full dome like structure and to showcase foliage color variation.
Landscape Placement:
- Ideal as a focal point in gravel gardens, containers, or sunny mixed borders where its evergreen foliage and seasonal flower bracts provide contrast and structure.
Companion Plants
- Allium giganteum (Giant Onion) - Provides tall purple globes that rise above Euphorbia’s compact form in late spring.
- Festuca glauca (Blue Fescue) - A compact grass that echoes Euphorbia’s form and contrasts with its warm variegation.
- Lavandula angustifolia (English Lavender) - Offers aromatic foliage and blue violet blooms that complement Euphorbia's coloring and sun loving nature.
- Salvia nemorosa 'Caradonna' (Wood Sage) - Offers vertical accent and deep purple flower spikes that enhance color contrast.
- Stachys byzantina (Lambs Ear) - Forms a silvery ground layer with soft texture that offsets Euphorbia’s structured form and bold tones.