Phaseolus is a genus of 250 species of bean from tropical and sub-tropical America.
P.caracalla is a twining perennial that produce lilac flowers.
They should be planted in compost made of equal parts loam and peat with additional sand. Place the plant in a well-drained pot and repot every year in February. The tolerated temperature ranges from as high as 18oC in the summer to a low of 10oC in the winter.