Vanilla is one of the world’s most expensive spices because it’s so labor-intensive to grow. Madagascar is responsible for 80% of the world’s supply. And there, each vanilla orchid blooms for just one day a year. Farmers have to hand-pollinate each flower because the plant isn’t native to the island. In recent years, the tough work has paid off, as vanilla prices soared to $600 per kilo in 2018.
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