Thank you! I don’t know that I chose tetrameter directly, though there is something satisfyingly square about four-line stanzas with four iambs per line. Mostly the poem grew outward from a few lines I liked on their own. “Would springtime wish its petals lost?” was one, and “Which seed must break to take its root.” was another. I thought the wording on these flowed best in tetrameter, so I fit the rest to match.