Common name: Bladder Senna.
Native: Mediterranean, North Africa
Size and spread (10 years): 4m +
Treatment required: Leguminous, needs scarification and soaking in water.
Seeds/kg: c.51,600 79% viable
Ideal sowing period: Spring or autumn under glass
Soil conditions: Will thrive in almost all situations.
Planting instructions: Will survive cold and exposure better if growing somewhere dry. Fine in coastal areas and also pollution tolerant. Can be pruned to the base from where it will sprout again.
Mature height: 4m+
pic courtesy of Buendia22, CC BY-SA 4.0 via Wikimedia Commons