Answer:
Here are a few: natural, wholesome, gentle, harmony, alive, vivid, flourishing, ethereal, harsh, unpredictable, survival, captivating
Explanation:
There are many tones that could work depending on your perspective of the poem. Nature can be wild and passionately beautiful, the splendor of lush, crisp grass and the steady trickle of pure and clear water over the smooth pebbles of a stream. Perhaps the biting chill of the first frosts upon aromatic pines encased in tufts of sparkling, fresh snow. All of it, even the heavy, humid whips of wind from a storm or the pelting of harsh bullets of rain, can significantly rouse the minds of poets. ;)
Hope this helps!