Ammachi Plavu is the name given to an old Jackfruit tree, which is lovingly known as the grandmother tree or the mother of all Jackfruit trees in the local Malayalam dialect of Kerala. This tree in certain temples has got its own historical and religious importance.
Ammachi Plavu in the Sree Krishna Swamy Temple at Neyyattinkara, is legendarily connected with the period of Marthanda Varma (1729 -1758). It is famous in the local folk lore as the tree that protected the king while on the run. The king hid in the huge hole of this tree to escape from his enemies.
Ammachi Plavu in the Thrikodithanam Mahavishnu Temple at Changanacherry has a special religious significance. It is situated near the eastern entrance of the temple. The priests offer prayers under its ancient, knotted trunk before beginning the ceremonies during the festival season.