Cacti

The Cacti chain is one of the earlier chains in the game and essential for the production of Mushrooms. At level 2 (3?), cacti will spawn Level 1 or 2 mushrooms into empty space around them.

Unusual Seed are produced by Luminous Flowers starting at level 3.

Starting at Level 4, Cacti can occasionally be harvested for Treasure Chests level 1 or 2. There is no visual indicator that cacti are ready to be harvested. The timer for all Cacti levels 4-6 (the wonder can't be harvested, see below) is 2 minutes precisely.

The Wonder, Mr. Cactus, produces a Llamedary egg every few hours, although this hidden timer only runs while you are playing on your main island. When initially created, each Mr. Cactus can be tapped to produce a Llamedary nest, and several eggs split between Llamedary and (green mystery) eggs.

Object Information
There are currently 7 different levels of Cacti, with level 7 being a Wonder: