Ruta Rue

Scientific Classification & Quick Facts

Common name	Rue
Scientific name	Ruta graveolens
Kingdom	Plantae
Phylum	Tracheophyta
Class	Magnoliopsida
Order	Sapindales
Family	Rutaceae
Genus	Ruta
Conservation status	Least Concern
Type	Evergreen sub-shrub
Habitat	Full sun; dry, sharply drained soil
Native range	Balkan Peninsula and the Mediterranean
Colours	Yellow flowers; blue-green leaves
Height	Up to 60 cm
Special feature	Sap can irritate and burn skin

The species Ruta graveolens, also commonly called the Herb of Grace, Rue, or Common Rue, belongs to the Ruta genus of the family Rutaceae. It is generally grown as an herb. Originally native to the Balkan Peninsula, it is now found all over the globe. It is grown in gardens as an ornamental plant, particularly because of its blue-colored leaves and occasionally due to its ability to tolerate dry soil conditions and hot temperatures. Besides its ornamental value, the common Rue is also cultivated for its medicinal value, its use as a condiment, and on rare occasions as an insect repellent.

History

Rue has a long and rich history due to its medicinal properties.  The term Ruta is derived from the Greek word “Reuo” which literally means “to set free”. Earlier, people used this herb for treating a wide variety of ailments. In those days, people planted this herb at home to keep away plagues and pests. It was considered as a protective herb that prevents deadly diseases. It was also considered good for the eyesight and improving vision. Legend has it that Leonardo Da Vinci and Michelangelo ate the bitter small leaves to improve their eyesight and creativity. Many herbalists of those ages like Hippocrates considered this herb very useful in the medical field and recommended its use. Wiliam Turner, a physician has included the name of Rue in his Herbal book published in 1562.

Anatomy

The leaves of the common rue are two- or three-lobed, feathery in appearance and green to blue green in color. The flowers consist of 4-5 petals, are arranged in cymes, 1 cm in diameter when fully bloomed and brightly colored yellow. The fruit is a capsule made up of 4-5 lobes containing many seeds.

Habitat

The genus Ruta, commonly called rue, belonging to the family Rutaceae, consists of evergreen sub-shrubs that grow to a height of 20 inches  (60 cm). They are strongly scented and are native to the Mediterranean region, besides Macaronesia and southwest Asia. The genus comprises of roughly 8 to 40 species, the most popular being Ruta Graveolens, (Rue or Common Rue).

Soil for Planting

The Common Rue is not very fastidious, and easily grows in moderately fertile and well –drained soils in full sun, requiring dry to medium moisture. These plants can tolerate some light shade as well as poor soil as long as the soil is sharply drained. Once established, they are drought tolerant. These plants also grow well in hot and dry regions, but wet soils, however, must be avoided. Winter mulch is an essential part of their cultivation in the northern parts of their growing regions. These plants must be pruned in early spring to remove the old wood and can be propagated by seeds or cuttings.

Planting

The Ruta can be propagated from the seeds or from semi-ripe cuttings. To propagate them from seeds, they should be sown during spring in containers placed in a cold frame. Cold frames are protective structures, used for propagating and growing plants that can be placed outdoors. Semi-ripe cuttings taken from semi-mature wood can be propagated during the summer.

Watering

New plantings should be watered regularly until they are well-established.  Once established, the Rue is quite tolerant of drought conditions. Though the Herb of Grace plants need not be watered under normal condition, during prolonged drought conditions, however, they would need watering. During winter, the base of the plant should be mulched to protect it from frost damage.

Temperature and Humidity

The optimal temperature is 68 F, but the seeds can be sown outdoors directly if the soil temperature is a minimum of 65 F.

Flowering and Maturing Care

Proper care is necessary in handling the plants as the sap of the plant can cause skin irritation. It can cause skin burns or leaf rashes.

Pests and Diseases

Phytophthora root rot is a common problem that is known to occur and can be averted to some extent by planting healthy plants from reputable nurseries in well-drained soils.

The Common Rue is generally disease free and is known to thrive well with minimal care.

Uses

Rue FAQs