Q.how to tell when butternut squash is ripe
How can you tell when butternut squash is ripe?
Certified GKH Gardening Expert
This sometimes depends on the individual gardener. For instance, some prefer to wait for the leaves to die. However, if you wait too long, the squash will lose its flavor. Many people wait until the stems turn brown and begin splitting. Generally, once the 'greenish stripes' start turning orange or brown, the squash is ready for harvesting. You really shouldn't wait until the fruit is fully grown to harvest, as it will be much more tender and sweet at an earlier stage. Some people also prefer to harvest just after the first frost. I would do so right before.
These articles can help:
https://www.gardeningknowhow.com/edible/vegetables/squash/when-to-harvest-squash-best-time-to-pick-winter-or-summer-squash.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/ripening-green-unripe-squash.htm