How is nature represented in "Loveliest of Trees, the Cherry Now"?

In Housman's poem, nature is presented as lovely. The speaker wanders through the woodlands in early spring and is enchanted by sight of blossoming cherry boughs. Every bit of imagery he uses to describe them is beautiful. For example, he says the blooming trees seem to be wearing white in celebration of Easter. Later, he also states that a cherry tree looks as if it is hung with snow.
The entire poem is a celebration of nature and the joy it brings. The speaker says that since he is twenty years old and can expect to live to seventy, he has only fifty springtimes left to see the cherry bough blooming. To him, that is not much time, so he plans to drink in the sight of cherry blossoms while he can.
This is a carpe diem or seize the day poem. Life is short, it says, so enjoy nature's beauties while you can.