Don’t know how I would, but sure
I would agree with you - the conclusion should leave readers with an important thought at the end.
This thought should never be new, or opposing to the previous ideas you had been writing before. It also shouldn't be confusing, but quite conversely - it should explain everything and put everything in place.
"Bestowing" means confer or present something to another, usually an honor, right, gift, or an item special to someone.
Answer:
In simple words, Season's "first green" flowers are connected to golden, earth's most valuable metal, instantly cementing gold as a metaphor of anything that is new, young, and lovely.
The following line, "Her hardest hue to hold," indicates that maintaining the innocent of the initial greens is the most difficult things to accomplish and he adds, "Her first leaf's a blossom / only so an evening." This is the third time he uses an analogy, suggesting that a blade is a bloom (and green is gold).