During the first three months, you should turn your mattress from end-to-end and flip your mattress from side to side every week. After three months, we recommend turning and flipping your mattress every few months. This ensures that the fillings inside your mattress remain distributed evenly.
However, do check your mattress specifications as some only need to be turned from end-to-end and not flipped. We often refer to these as single-sided, 'easy-care' mattresses.