A node farm is a cluster of eight harvesting nodes of the same type. There is exactly one node farm in each of the 25 original zones, except for Malchor's Leap and Cursed Shore. The nodes in a farm respawn every 23 hours, similar to rich metal veins, rather than the 1 hour of normal gathering nodes.
List of node farms
Not node farms
There are clusters of permanent Cypress Sapling nodes at two Statues of Melandru in Orr. These are not true node farms because they respawn after 1 hour and they are logging nodes, not harvesting nodes; however, they are similar in that they are the only locations in the game with a guaranteed spawn of a large number of logging nodes.