There are 6 different materials included for all items except the cactus.
The texture size for the items are 64*64 and there are a total of 3 different looking textures, in 6 different colors (except the cactus, there is only one color of that one).
The models are between ~25 to ~300 Tris, depending on the complexity of the model.
there are also some examples of plant combinations included in the package.