Trappoinsettia

The Trappoinsettia is a powerful plant that sets traps. Note that its traps can be activated by plants as well as zombies, but, thankfully, its cost goes down once one is activated. It is a good idea to use this to protect your back lanes in case of an emergency, although some other plants may be better at such activities. Unlike the Tile Turnip, the cost of an imitated version does not go up as the normal version does - Imitater Trappoinsettias create grey traps, compared to the normal Trappoinsettia one's red and the preplaced one's green. Since you were promised more concise data about how the three boulders damage plants and zombies...