Hops act as a natural preservative, and organoleptically contribute to the flavour, bitterness, and aroma of the product. Different hop varieties are grown around the world, with aromas and flavours ranging from the spicy, earthy texture of English Goldings hops to the resin and citrus taste of American Simcoe and Cascade hops, and the tropical fruit flavours of New Zealand varieties. German and Czech hops provide the distinctive “elevated” aromas that lager brewers appreciate.