FLOWERS consists of a 108-card deck, with cards coming in four colors and values 1-4. Each player starts with a random card in their play area, and the remaining cards are divided into stacks, with one being face down and the others having the top card face up.

On a turn, draw a card from the top of any stack, then either place it adjacent to a card already in your field or on top of a card in your field. If you draw a face-up card, flip the next card in the stack face up. When a player takes the last card from a stack, they place it, then the game ends.

At game's end, every 4 in your field must be part of a group of exactly four 4s, and the same goes for every 3 and 2 in your field. Each 1 must not be adjacent to another 1. Any cards that violate these rules are removed from your field (including any covered cards), and you lose 1 point for each card removed. Then, for each group of colored cards in your field that contains at least five adjacent cards, score 1 point for each of these cards. Finally, if a card with a butterfly is adjacent to a card of the same color as the butterfly, score 1 point for that card. Whoever has the most points wins.