Diamond Mountain Euphorbia

Diamond Mountain® is a large, mounded annual euphorbia selected for clouds of airy white flowers and a broad landscape presence. Its vigorous growth makes it useful where a soft-textured filler can share space with other strong-growing plants. ([Proven Winners](https://serv3.provenwinners.com/plants/euphorbia/diamond-mountain-euphorbia)) ## Growth and siting Plants reach about 24–36 inches tall and wide, with a flowering season from spring through fall and blooms continuing until frost in suitable conditions. Site it in part sun to sun; the breeder also reports good performance in shade. Average soil and moderate watering support garden growth, while heat and established-plant drought tolerance make it useful in warm summers. ## Landscape use Use Diamond Mountain in mixed borders, mass plantings, and large containers. Its airy flowers blend with vigorous companions and can soften the edges of a planting without overwhelming them with dense foliage. ## Maintenance The flowers are self-cleaning, so deadheading is unnecessary. Water newly planted specimens while they establish, then adjust irrigation to weather and container conditions. A light trim can refresh the shape if needed.