Do you like stylised design motifs like Art Deco, Art Nouveau, Arts and Crafts, Steam punk, Japanese etc?
Try this exercise. Choose a design flower or tree for each of the four seasons. For example, for winter, choose Snowdrop; for spring, a Tulip or Iris, summer Rose or Poppy, autumn Chrysanthemum etc.
Sketch design or stick photo on A4 paper for each of the season.
Identify 3 or 4 colours that represent each season for you and attach a colour swatch to your page.