There are plenty of equally critical components to breeding new frogs and replenishing the areas around your Atlas inMudborne, but it all begins with your composting choices. Compost helps you grow different mushrooms, and the mud you make with these mushrooms decides the traits your frogs receive.
You’llmaster basic compost recipesearly on in Mudborne, but the more maps you explore, the more compostable items you’ll find, the more varieties of compost you can produce back home. There are eight unique compost recipes in Mudborne, and each kind of mushroom spores in a set kind of compost bin.

Different Composts Nurture Different Mushroom Spores
You’ve likely seen and collected some of the various mushrooms around the Spawning Pools when you first begin playing Mudborne - your guidebook actually won’t let you move on without them past a certain point. Follow the instructions you’re given in the guide, which leads you totrading with Hopert for a composter. Heasks for five logsand a bucket of mud in exchange, so once you’ve made the swap, head back outside and place the cultivator on any solid surface nearby (ground or any floor planks you’ve placed near the dock to create footpaths).
After your composter is down, you’ll need toadd three layers of varying collectible resourcesto compress together to form your compost, and which resources you choose for each cultivator ends up creating a different kind of compost. With three layers total, each of them having three items that work in that layer, there areeight compost recipesin total for you to discover in Mudborne.

To use a composter, you’ll need to layer items in the following order:
After setting the layers in the cultivator and putting in a fewempty bucketsto collect the compost itself,wait for time to passfor nature to work its magic, either by wandering through the nearby area looking for more resources or just taking a nap to pass the time. Once the layers have set together, you’ll have a different kind of compost based on your ingredient choices.

(Any combination not listed below)
Slower growing time, but higher yield
Faster growing time, but smaller yield.
Prevents anything from growing.
For the most part, Leafy Compost is what you’ll receive the most; few specific recipes lead to other composts, so follow the recipes above carefully! It has its uses, but if you’re trying to make something specific, double-check your recipe. For an easier time, once you’ve discovered a compost recipe on your own by experimenting, you’ll log the recipe in the compost menu for safe keeping for the next time you need to make that type of compost.
You’ll know your compost is finished when there’s an icon of a smallbucket full of green compostdisplayed above the cultivator, so stop by to pick it up so more can be made. The composts you place in cultivators vastly impact which mushrooms you’re able to grow, and with mushrooms as the essential ingredient for changing yournew frogs' traitsat the end of the breeding process, you’ll want as many different kinds of compost as you can make.