Grandiflora leaf is toxic to chickens and should not be fed to them or other monogastric animals. Soil improvement . Grandiflora is often maintained in gardens and around crop fields for its contribution of nitrogen. The light shade cast by its canopy does not block much light, allowing the growth of companion plants. Falling leaflets and flowers recycle nutrients to the ground.
Seedlings grow rapidly enough that they have been used similarly to annual green manure crops.
For example, grown around paddy bunds for incorporation before planting the subsequent rice crop. The trunks may be used as poles for temporary shelters and sheds, but they may not last very long due to rots and insect infestation. Leaves, seed pods, and flowers of grandiflora are prepared as food. The young, tender pods are cooked similarly to other green beans. In the Philippines, unopened white flowers are a common vegetable, steamed or cooked in soups and stews after the stamen and calyx have been removed.