Evergreen: Pines and Cacti is a set of two modular expansions for Evergreen that introduces two new kinds of plants that interact with light and shadow in interesting ways.
Each modular expansion introduces a new power, and the game uses exactly six powers, so remove one power from play for each expansion module you add.
Small pines long for the kiss of sunlight, so they spontaneously grow into big pines when they are in shadow at the end of a season.
Cacti can grow very quickly, but they need a lot of light to survive. Make sure they are not in shadow at the end of a season or they will die!