In a contemplative tour of the year, Fogliano and Morstad sensitively yet strongly evoke seasonal experiences like standing at the ocean’s edge, anticipating sweater weather, and uncovering acres of mud beneath melting snow. The poems—roughly a dozen per season, and all given dates—range from just a few lines (“just like a tiny, blue hello/ a crocus blooming/ in the snow” for March 22) to longer reflections: the July 10 poem that lends the book its title (“when green becomes tomatoes/ there will be sky/ and sun/ and possibly a cloud or two,” it begins) reads like it could have been a standalone companion to Fogliano’s If You Want to See a Whale. Working in gouache and pencil, Morstad (Swan) creates an appealing, multiracial cast of children in scarves and swimsuits, pajamas and parkas, while helping highlight the way that small things—a sprouting plant, a falling leaf—can herald big changes. Ages 6–10. Illustrator’s agent: Emily Van Beek, Folio Literary Management. (Mar.)