Outside the warehouse in northwestern Spain, it's a freezing, foggy morning but inside it's balmy, the warmth and LED lights fooling 360 hop plants to flower as if it were late August.
Mounted on a soaring grid system of cables and wire, these vigorous climbing plants are in full flower, covered in delicate papery-green hops which are prized for giving beer its unique aroma and crisp, refreshing bitterness.
