Dyer's Greenweed, Common Woadwaxen, Broom

Genista tinctoria

Physical Characteristics

Genista tinctoria is a deciduous Shrub growing to 0.6 m (2ft) by 1 m (3ft 3in) at a medium rate. See above for USDA hardiness. It is hardy to UK zone 2 and is not frost tender. It is in flower from June to September, and the seeds ripen from August to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. The plant is self-fertile. It can fix Nitrogen. It is noted for attracting wildlife. Suitable for: light (sandy) and medium (loamy) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers dry or moist soil. The plant can tolerates strong winds but not maritime exposure.

Distribution

Europe, including Britain, from Norway to the Mediterranean, east to the Urals, Caucasus and W. Asia

Habitats

Woodland Garden Sunny Edge; Ground Cover; Meadow;

Edible Uses

Edible Parts: Leaves Edible Uses: Coffee Condiment The seed has been suggested as a possible coffee substitute[177, 183]. The flower buds are pickled and used as a substitute for capers[2, 183]. Used as a vegetable[105].

Medicinal Uses

Cathartic Diaphoretic Diuretic Emetic Homeopathy Stimulant Vasoconstrictor The twigs, leaves and flowering stems are cathartic, diaphoretic, diuretic, emetic, stimulant and vasoconstrictor[4, 9, 21, 46]. The seeds are also sometimes used[4]. The plant is harvested in early summer as it comes into flower and can be dried for later use[9]. It should not be stored for more than 12 months since its active ingredients break down[238]. The powdered seeds act as a mild purgative and were at one time used to make a plaster for broken limbs[244]. A decoction of the whole plant has been used as a remedy for dropsy, rheumatism and gout[4, 9, 244]. A homeopathic remedy is made from the fresh shoots[9]. It is used in the treatment of rheumatism[9].

Known Hazards

None known