Perennials

Euphorbia × martinii 'Ascot Rainbow'

Ascot Rainbow spurge

Ascot Rainbow spurge, Euphorbia x martini 'Ascot Rainbow'

Green-and-yellow leaves take on red and orange tones in cool weather. Spring clusters of green-and-yellow bracts add color above the upright mound. Trim after flowering to encourage bushy growth; protect skin and eyes.

At a glance

Sun: Full sun to part shade
Mature size: 18–36 in. tall × 15–30 in. wide
Water: Dry to moderate; sharply drained
Hardiness: USDA zones 6–9
Bloom: Green and yellow bracts; April–May.

Sizes & prices

#1$18.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Deer: Resistant, not browse-proof.
Drought: Tolerant; occasional summer water is helpful.
Wet soil: Wet winter soil can be fatal.
Heat: May struggle in hot, humid weather.
Powdery mildew: Good resistance, not immunity.

Resistance is not a guarantee; deer and rabbits may browse any plant.

Keep in mind: Toxic milky sap can seriously irritate skin and eyes. Wear gloves and eye protection; do not eat any part.

Seasonal interest

Foliage: Evergreen in warm winters; cool weather adds red-orange color.

Growing & care

Winter: Choose a well-drained, sheltered position.

Sources & photo credits

Missouri Botanical Garden

Photo: Kathleen Moore · CC BY 4.0

Image notes: Ascot Rainbow spurge, Euphorbia x martini 'Ascot Rainbow' Resized for web display; no crop.

Reviewed September 19, 2026. Growing conditions vary by location.