Physical Characteristics : A decidious Shrub growing to 3.6 m (11ft) by 3 m (9ft) at a fast rate. It is hardy to zone 5. It is in flower from Jun to September, and the seeds ripen from Sep to October. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees.It can fix Nitrogen. It is noted for attracting wildlife. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils, requires well-drained soil and can grow in nutritionally poor soil.The plant prefers acid, neutral and basic (alkaline) soils..It can grow in semi-shade (light woodland) or no shade.It requires dry or moist soil and can tolerate drought.The plant can tolerates strong winds but not maritime exposure. It can tolerate atmospheric pollution.

Colutea arborescens is a species of leguminous shrub known by the common name bladder senna . It is native to Europe and North Africa, but it is known on other continents where it is grown as an ornamental and used in landscaping for erosion control. It is also known in the wild as an occasionally weedy escapee from cultivation. The shrub takes a rounded form and has many branches covered in deciduous leaves. The leaves are made up of many pairs of slightly hairy oval-shaped leaflets, each up to about 3 centimeters long. The inflorescence is a raceme of generally pea-like yellow flowers about 3 centimeters long. The fruit is an inflated bladdery pod which dries to a papery texture. It is 2 to 3 centimeters long and contains many seeds.