Storing green coffee through a damp winter

Green coffee keeps for months, but not next to a kettle. Last winter one bag picked up a musty smell after six weeks in the cupboard above the stove.

This year the beans live in grain-pro bags inside a plastic box in the hall, with a hygrometer that cost a few pounds. Humidity stays between 55 and 62 percent and the coffee from October still roasts and tastes like it did when it arrived.