How to Tell When Compost Is Finished
Look at texture, smell, and temperature together before moving a curing batch into the garden.
Published by ThriveThyme
compost curing soil
Look for several signs together
Finished compost is generally dark, crumbly, and earthy-smelling. Most original ingredients are no longer recognizable. A batch that remains near outdoor temperature after turning is more promising than one still reheating strongly. A cold reading by itself is not enough.
Stop adding fresh scraps while a batch cures. Keep new additions in another pile. Screen out coarse pieces for further decomposition rather than treating them as finished material.
Keep a record before applying it
Save the batch name, observations, and any remaining concerns in the Compost Troubleshooter. This is an observation record, not a laboratory maturity or sanitation test.
Next Steps
Use Soil Test and the existing compost and manure application guide before adding more material to a bed.