Botany Blight

Botany Blight was island in the Barbaric Archipelago.

Description

 * Low tide reveals fields of native Blue Oleander flowers that thrive in salt water and poison any dragon.

In Race to the Edge
Following a battle with the Dragon Hunters, Hiccup was invited by Dragon Hunter Chieftain Viggo Grimborn to the island to discuss a truce between their two factions.