Can you please explain the poem "The Heart of the tree" by henry cuyler bunner along with the poetic devices used in it?

In "The Heart of the Tree," the narrator praises men who plant trees. In the first stanza, he praises tree planters for helping nature thrive and for making the world a more beautiful place. Planting a tree also accords with heaven's harmony.
In stanza two, the narrator praises tree planters for their unselfish acts that will benefit future generations. A tree planter is contributing to the common good and to the future.
In stanza three, a tree planter is described as a good citizen. He is a patriot who contributes to the growth and well-being of the nation.
Literary devices include alliteration, rhyme, and repetition. Alliteration is placing words that begin with the same letter in close proximity. Bunner uses alliteration throughout the poem in pairings such as "hushed" and "happy," "fade" and "flush," and "hollow," "His," and "hand." The poem also uses a regular rhyme scheme that starts with an ABAB pattern in each stanza and then turns to rhyming couplets. Finally, Bunner employs repetition at the start of each stanza by repeatedly asking the question, "What does he plant who plants a tree?" All of this adds a pleasing sense of cadence and regularity to this poem, making it easy to digest.