I got a Sun Dragon by breeding Fire and a Storm Dragon. I don't know how to breed the Moon Dragon though. I am still working on it.
You can't breed a Sun Dragon with a Moon Dragon because they are not compatible.
The Sun Dragon is Orange with Fire around it. The Moon Dragon is Blue with Moons all over it.
Breeding a storm dragon and plant dragon together can either get you a sun dragon or a moon dragon along with a lichen, storm or cactus. If it takes 48 hours to breed/incubate then you have either sun or moon. If you keep trying you will get it eventually I did.
The sun dragon is yellow and orange, and it has flares around its head and tail. The moon dragon is pale blue, has crater textured skin, and a crescent moon at the end of its tail.
You have to breed a sun and moon dragon together
You have to breed a storm and fire dragon. ( which might end up as a sun dragon ) or crystal and blue fire. ( which also might end up as a sun dragon ) But there other ways to.
Blue fire and quake, sonic and quake. Most successfully with blue fire and quake, I have two moon dragons from this combination but also got a sun dragon from them.
You can try to combos of crystal dragon with bluefire dragon.
You would either get a Cactus dragon, a Storm dragon, a Lichen dragon, an Ash dragon, a Hail dragon, a Sun dragon, or a Moon dragon.
Plant + lightening which also breeds sun dragons
Plant + lightening which also produces moon dragons
48 hours normally