Pumpkins are usually ready to pick 90-120 days after planting, depending on the variety. Signs that your pumpkin is mature and ready for harvest include:
The stem has turned brown, woody, or withered.
The pumpkin has fully developed its typical deep color for the variety.
The rind is hard and cannot be punctured easily with a fingernail.
The pumpkin sounds hollow when tapped.
The vines begin to die back and lose color.
Always harvest before the first hard frost to prevent rot.