The climate of Heligoland is typical of an offshore climate, being almost free of pollen and thus ideal for people with pollen allergies.
Owing to the mild climate, figs have reportedly been grown on the island as early as 1911,[REF] and a 2005 article mentioned Japanese bananas, figs, agaves, palm trees and other exotic plants that had been planted on Heligoland and were thriving [REF].