Botanical Name: Euphorbia hypericifolia ‘Diamond Frost®’

Common Name: Euphorbia, Spurge

Hardiness Zone: Annual in Most Climates; Perennial in Warm Regions (USDA Zones 10–11)

Size: 12–18" Tall × 12–18" Spread

Growth Habit: Airy, Mounding, Well-Branched Habit

Sunlight: Full Sun to Partial Shade

Soil: Well-Drained Soil; Adapts to Average Garden Soil

Water Needs: Low to Moderate; Drought Tolerant Once Established

Bloom Season: Late Spring through Frost

Fertilizer: Minimal; Avoid Excess Fertility

Features: Clouds of Tiny White Flowers, Fine Texture, Exceptional Heat Tolerance, Continuous Blooming

Uses: Containers, Hanging Baskets, Borders, Mass Plantings, Filler Plant

Patent: ✔ Patented

Propagation: ❌ Propagation Prohibited Without License

See our complete Euphorbia Growth & Care Guidefor full care details.

More About Euphorbia ‘Diamond Frost®’

Euphorbia ‘Diamond Frost’ changed the Euphorbia game when it was introduced in 2005, and even now, decades later, it still holds its place as one of the top varieties. Instead of relying on large, flashy blooms, this variety produces thousands of tiny white bracts that create a soft, airy haze over the plant. From late Spring until the first hard Frost, it flowers continuously, forming what I often describe as a living cloud woven right into your containers and beds. The structure is what makes it so special. The fine, highly branched stems form a naturally rounded, billowy habit that feels light and almost weightless in a planting. 

It typically grows 12 to 18 inches tall and wide, depending on conditions, and it keeps a clean, refined silhouette all season long. There’s no stretching awkwardly toward the sun and no unsightly gaps forming in the center. The foliage remains tidy and green, serving as the perfect quiet backdrop for that constant flurry of white. In containers, it spills gently over the edge, creating that professional, finished look people often think requires a designer’s touch. What makes ‘Diamond Frost’ truly exceptional is that it never needs deadheading. The spent blooms disappear into the canopy, and new ones immediately replace them. You get nonstop bloom without the maintenance headache. For busy gardeners or commercial installations, that alone makes it invaluable.

Why We Like It (Our Trials)

In our trials, it consistently powers through intense heat, thick humidity, and even dry stretches once established. I’ve seen it thrive in containers that missed a watering cycle and bounce right back without drama. That kind of resilience matters when you’re growing and selling plants to customers who don’t always have perfect conditions. What impressed me most early on was how it elevated everything planted around it. You could take an average combination and add ‘Diamond Frost,’ and suddenly the entire container looked more refined, more dynamic, more intentional. It creates separation between colors, highlights bold blooms, and softens harsh contrasts. It’s like adding light to a painting.

We’ve used it in hanging baskets, window boxes, mixed annual containers, landscape borders, and even large-scale mass plantings. In every setting, it performs. Deer rarely bother it, pests are minimal, and disease issues are almost nonexistent when planted in well-drained soil. It simply shows up and does its job from Spring through Frost. There are very few annuals I would call truly game-changing. ‘Diamond Frost’ is one of them. Even after all these years and all the breeding advances we’ve seen, it still feels modern, still feels fresh, and still earns its spot in our production schedule year after year.

Diamond Frost vs. Other Euphorbia Varieties

Diamond Frost is entirely different from the rest of the Euphorbias we grow, and I always make that clear when I’m walking customers through the bench. Compared to Tasmanian Tiger and Ascot Rainbow, Diamond Frost doesn’t compete for attention with bold variegation or dramatic leaf color. Tasmanian Tiger brings strong cream-edged foliage and structure, while Ascot Rainbow offers year-round presence and architectural form. Diamond Frost, by contrast, stays light and understated, acting more like a finishing touch than a foundation plant. While most euphorbias are selected for bold foliage or architectural presence, Diamond Frost is grown almost entirely for its nonstop bloom and that incredibly fine, airy texture.

When you place it next to darker foliage varieties like Blackbird and Bonfire, the effect is even more dramatic. The white flowers glow against those deep burgundy leaves, softening the intensity and adding balance to the composition. And when paired with something cooler and more refined like Glacier Blue, it keeps the planting from feeling too rigid or heavy.  Diamond Frost doesn’t create a strong silhouette or anchor the design the way a foliage variety would. Instead, it lifts a planting, weaving between other plants and softening hard lines. When you use it correctly, it fills gaps and brightens combinations without ever adding visual weight.