Agastya (Sesbania grandiflora) – Uses, Benefits, Dosage and Properties Introduction FAQs Description of Agastya Tree Agastya is fast growing and soft wooded tree grows up to 3-8mt in height. Leaves are regular, deciduous, and abruptly pinnate and rounded about 15-30cm long and has 10-20 leaflets. According to different species this plant bears red and white flowers. Agastya tree flowers are long, has 2-4 flower racemes, shallowly 2 lipped and are boat shaped. Plant bears flowers in month of September and