you can't get it by breeding, you have to buy it.
By Breeding Earth and Plant Dragon, you can also have Tropical Dragon with Earth and Plant.
By breeding fire with plant
You would either get a plant dragon or another moss dragon.
You get a plant dragon.
Cactus and Ash Dragons.
There is no such a thing as Plants to get any type of dragons But you can get it by breeding them
breeding pirate dragon and scoccer dragon on dragon city
Dragon Breeding is where you get a breeding cave/breeding island and press breed, Then it takes a few hrs. to do but when they finish you get a new tipe of dragon.
By breeding paladin and dendelion dragon?
A Nenufar Dragon is one possible result of breeding a Plant Dragon and Water Dragon. A Dark Dragon is one of the eight basic elemental dragons. If you breed these two dragons you may end up with any one of a variety of hybrids including a Pirate, Butterfly, Burning, or Petroleum Dragon.
Breed air and and grass you breed grass and air 8hrs incubation You have to do Grass and Flying and if you don't have flying you have to do water and fire but if you don't have water you have to wait and buy it.
To get the rattlesnake dragon on dragon city you breed the dark dragon with the plant dragon.i am not kidding.if you want even cooler dragons try breeding dark with water or metal with dark. Trust me they are so cool.