Although one may complain that no kalpa-vrksa, wish-fulfilling trees, exist there [Vrndavana], when the Six Gosvamis were there, kalpa-vrksa were present. It is not that one can simply go to such a tree and make demands; one must first become a devotee. The Gosvamis would live under a tree for one night only, and the trees would satisfy all their desires. For the common man this may all seem very wonderful, but as one makes progress in devotional service, all this can be realized.
>>> Ref. VedaBase => TLC Introduction