Photosynthesis is a strategy board game designed by Hjalmar Hach and published by Blue Orange in 2017.

[1] There are four differently-coloured player boards (blue, green, orange, and yellow) with similarly-coloured trees of three different sizes (small, medium, and large) and seed tokens.

[4] In the Life Cycle Phase,[2] the accumulated light is spent on growing trees, the cost of which is indicated on the associated spaces on the player board.

[4] Play continues until the sun has made 3 or 4 full rotations about the central board (determined at the beginning of the game).

[3] In a review for Meeple Mountain, David McMillan stated that Photosynthesis is "just a beautiful game" with unique mechanics.

[2] He also stated that the expansion set Photosynthesis: Under the Moonlight detracted from the game and worsened gameplay, though it did have a few interesting additions.