Cytisus scoparius
Deciduous shrub with bright yellow flowers in spring, thin stems. Very resistant to drought and poor soil.
Scotch broom requires full sun exposure (at least 6 hours per day) and well-drained soil, even poor or sandy, as it is very sensitive to excess moisture; water sparingly, allowing the substrate to dry out completely between waterings. It is a very hardy shrub that tolerates frost down to -12 °C, so no winter protection is needed in Mediterranean or temperate climates. Plant it in autumn or spring in spacious outdoor areas, bearing in mind it can reach up to 2 m in height, and handle it with care as all parts of the plant are toxic.