Fast growing & adaptable ornamental small tree. Like other Caesalpinias, Mexican bird are nitrogen fixing legumes that do not require additional fertilization even in average soils. They will grow as a large multi-trunked shrub or can be easily pruned into small accent trees. Blooms are yellow formed in spikes above the foliage, followed by long pods containing hard seeds. The fastest growth comes from moderate supplemental water initially, but once established trees can adapt to once per month deep soakings.