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Lightly waving on slender 10 inch stems, lemon-yellow flowers are held above narrow, pleated, gray-green leaves. It performs well in a sunny, dry rockery, in clay, or is equally happy in a moist sandy area, too. Slowly naturalizing, it will cheer you on through spring, and after a mid-season dormant period, will lustily revive in early fall. Native to southwestern Europe. Clumping; deer-resistant.Minimum temperature: -10° F