Yavanna's Chosen

[Inziladun]

Originally Posted by Raynor

Well, we might attribute that to many things. On one hand, Gandalf may have impressed the ent very much, with his dedication, passion, and possible higher spiritual standing, so that even if the other istari did they best, they just couldn't measure up to him.

That would seem to say even less for Radagast. Gandalf's forte was primarily working with the remaining Eldar and Dúnedain, and the fact that to the chief of the Ents he was more notable than Radagast, who was supposedly looking out for Yavanna's interests, suggests Radagast failed even in his 'secondary' mission.