Yes, its just as corny as it sounds. At the beginning you can choose between their types of characters: A flower, a cactus, or a tree. The flower is the fast character, the cactus is best at offense, and the tree is best at defense. You can fight with a variety of different weaponry including Yo-Yos, a Garden Hoe, or press-on nails. You can also defend yourself with items like a Coffee Mug, a Pink Butterfly Face Tattoo, or a Ill-Fitting Nixon Mask.
The game is pretty good in its own right, but it is nigh unplayable without what they call “donator days” which aren’t overly expensive ($2 for 31 days), but is not a option of some people. Without donator days you basically can only take ½ of the actions you normally could, because your energy (or fertalizer) recharges at half speed.
There are a fair number of good things about this game however. They have a “battle ladder” to help you determine how strong you are in comparison to other players, research-based stats, and passive income in the form of digging and keeping a bee hive.

For those willing to pay for donator days: (3 1/2 stars)
For those not willing: (2 stars)

Plant Wars