Tip: Don’t forget to feed your starter! This starter likes a higher hydration than a traditional sourdough starter. (The hydration is 150%.) For example, for 15 g of active rye starter, you would feed it with 45 g room-temperature water and 30 g fresh-milled rye flour. With this feeding, your starter will peak in 4 hours. From there, you can continue to feed it if you’re going to bake it soon or you can refrigerate it for up to a week. Be sure to feed it at least twice, though, before you prepare this rye loaf. To keep the starter alive and active, feed it after preparing the recipe too.