Answer:
It means that nothing is permanent in life.
Step-by-step explanation:
The literal meaning of "Nothing Gold Can Stay" is "nothing is permanent in life."
In the poem "Nothing Gold Can Stay" by Robert Frost, the poet explains the mortality of life and how nature itself fades and dies eventually. Here, nature is described as gold because it is very precious and beautiful.
Through the lines "Her early leaf’s a flower; But only so an hour.", the poet says that even nature does not last forever but it is bound to fade away just like the Garden of Eden.