How long do tea bags take to compost? 28 April 2021 13:16 Updated This will take between 1 to 2 years, which is typical of most tea bags not just a Fortnum’s bag. Related articles How to do you dispose of the string and tag attached to the tea bag? Is the Christmas Tea Lovers Advent Calendar the same as last year? What is the Hamper Exchange? Is your gift packaging recyclable? What is the straw-like material inside your hampers?