Retaining the shelf life of ragi flour involves taking measures to prevent spoilage, preserve freshness, and protect it from factors that can lead to degradation. Here are some additional tips to help extend the shelf life of ragi flour.Retaining the shelf life of ragi flour involves taking measures to prevent spoilage, preserve freshness, and protect it from factors that can lead to degradation. Here are some additional tips to help extend the shelf life of ragi flour.