My family recently added butternut to the selection of fruit and vegetable plants in the garden. The plants are in a reasonably sized pot, growing onto concrete at one side and an earth/stubbly grass plot on the other.
Our particular experience that may be relevant is with potato and pumpkin, both from pots/bags and from beds/plots.
As I have not previously bought or prepared butternut and given the varieties that may affect what "looks like" a suitable fruit, how can I determine which fruit is ready to be picked, brought in, stored and possibly eaten?
In particular, what can a gardener of low experience check, for example from the size and colour of the fruit, any physical properties (e.g. tapping sounds), and the behaviour of the vines or plants?