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

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See our complete Euphorbia Growth & Care Guide for full care details.

More About Euphorbia ‘Diamond Frost’

Euphorbia ‘Diamond Frost’ is one of the most popular annuals ever introduced, prized for its airy clouds of tiny white flowers that appear nonstop from late spring until frost. Rather than producing showy individual blooms, this plant creates a soft, mist-like effect that weaves seamlessly through mixed plantings.

The fine, branching habit gives it a light, floating appearance, making it an ideal filler plant that adds brightness without overpowering surrounding colors. It pairs equally well with bold, colorful flowers and subtle pastel palettes.

Why We Like It (Our Trials)

In our trials, ‘Diamond Frost’ has been exceptionally reliable through heat, humidity, and dry spells. It blooms continuously without deadheading, maintains a clean shape, and resists most pests and diseases.

We especially appreciate its versatility. It works beautifully in containers, hanging baskets, borders, and mass plantings, often improving the look of everything planted around it. Few plants are as forgiving or as consistently attractive across such a wide range of conditions.

Diamond Frost vs. Other Euphorbia Varieties

Diamond Frost is entirely different from the rest of the Euphorbias here, grown primarily for its constant flowers and fine, airy texture rather than foliage form. Its clouds of small white blooms appear from spring until frost, weaving lightly through containers and borders. Instead of anchoring a planting, Diamond Frost lifts it, softening edges and filling gaps without adding visual weight.

Compared to Tasmanian Tiger Euphorbia, Blackbird, Bonfire, Ascot Rainbow, and Glacier Blue, Diamond Frost plays a supporting role rather than a structural one. It pairs exceptionally well with darker foliage, especially Blackbird and Bonfire, where its white flowers brighten and soften the composition. When combined with variegated varieties, it prevents plantings from feeling too busy or heavy. Gardeners rely on Diamond Frost for effortless bloom, light texture, and season-long filler performance.