Euphorbia marginata This annual euphorbia is a blinding attention-getter when summer's sun reflects off its shining drifts of crystalline foliage. Leaves on the upper portion of the plant have a central grey-green vein seeping into the snowy white giving the 2-3 foot plants a spectacular, iced look. Adds a flash of light to a mixed planting or creates a brilliant, glowing border. Approximately 80 seeds per gram. Germination code: (1)