Usually, as long as you have one element as the same.
Because fire and cold cannot be breeded together . Cause fire is the opposite to cold
well, if you're talking about dragonvale i breeded a firefly dragon and a seaweed dragon. took me about 10 tries but you'll eventually get it. THe re are some other combinations too.
There is no such thing as a Birthstone Dragon on DragonVale
As of July 2012, there has not been a star dragon in DragonVale.
You don't breed a Kairos Dragon in DragonVale. You have to get parts to complete it.
The incubation time for a rainbow dragon in DragonVale is 48 hours.
To date, there is no grass dragon in DragonVale. You may be thinking of the plant dragon. See the related question.
love dragon and panlong dragon
Sonic Dragon and Flower Dragon
Brass Dragon and Fire Dragon
Water dragon.
Fire Dragon and Lightning Dragon