Blue Mound Rue Herb Plant - 4 Plants - Ruta - Insect/Mosquito/Cat Repellant Repels insects, mosquitos and cats Hardy Zones 5-8, Mature Height: 24-30" Ruta graveolens 'Blue Mound' Months of Bloom: Summer. Color of Bloom: Yellow Immediate shipping in 2 1/2" pots. Dormant shipping in winter.