As I drive around here on nice sunny days in the Northeast U.S. in mid-April, I see all the dead vegetation coming back to life. Tree canopies developing those bright green or yellow-green leaves, resulting in a lacy look of hints of bright green with the structure of the canopy still visible. Then there are still bare trees with the redish buds appearing all over them, making the tree look like someone gave it a gentle overspray of redish paint. Then there are trees which flower before leaves develop, so the entire tree is covered with large bright white, pink or other color flowers. Same with bushes like the Forsythia with their bright sunny yellow flowers. Then there is luscious green grass covering lawns and, lots of very colorful flowers blooming all around. Everything's coming back to life looking lucious and fresh.
Most train layouts seem to depict mid-summer scenery. Sure here are some winter scenes, and also Autumn with its bright foliage colors, but don't ever recall someone modeling those fresh looking Spring colors.
