When your Bartlett pears are mostly green in color they offer a firm crunch when eaten. You can enjoy them at this stage, or wait for a few days to enjoy an even sweeter flavor. Mostly yellow pears will yield when touched. They are crisp and delicious at this stage of ripening. When you pear is yellow and soft to the touch, it's ready to be eaten. Refrigerate to preserve ripeness for 3 to 5 days.