50 YELLOW RUE (Herb of Grace / Common Rue) Ruta Graveolens Herb Flower Seeds BLOOM TIME: Mid Summer HARDINESS ZONE: 3 - 11 PLANT HEIGHT: 18 - 24" . . . PLANT SPACING: 15 - 18" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average - Dry This Rue has bluish green fragrant evergreen foliage. It is an ornamental herb that tolerates heat and dryness well. It has medicinal properties and is also used as an insect repellent.