The 'Vigorous Growth' module consists of three triple tiles with symbols "3", "4", or "5" printed on the back. With this module, players can accelerate the development of their bonsai tree by acquiring new special tiles.

At the beginning of your turn, you may discard as many cards as indicated on one of the triple tiles still available in order to obtain that tile. Turn the tile over and place it in your bonsai immediately, making sure that at least one of the four wooden sides of the tile touches a bonsai wood tile, then take the rest of your turn as usual.

The cards you discard must all be of different types. The types of cards are Growth, Tool, Helper, Master, and Parchment. You may discard cards from your play area and your deck. Discarded cards are removed from play and no longer provide their effects or any victory points at game end. Each player may obtain only one triple tile per game. Once obtained, a triple tile is no longer available.