Long-lived and incredibly showy chartreuse Euphorbia Polychroma, commonly called Cushion Spurge, is a mounding, clump-forming perennial considered one of the best for borders. Growing in an attractive dome (or cushion, it bears dense, flattened golden-yellow to lime-green flowers in spring, and is one of the few perennials to display a showy fall foliage. Its erect, sturdy stems bear cymes of inconspicuous chartreuse flowers in mid spring. Although the flowers themselves are not showy, they are subtended by long-lasting, showy bright green floral bracts which are exceptionally eye-catching. Typically grows up to 18” in. Great for containers or borders. Tolerates poor soils, including rock or sandy. The milky sap may cause irritation to skin and eyes. Do not eat! Zones 4-9.