In DragonVale for the Android & iOS devices (iPhone, iPad, etc.) the Spring Dragon is a limited dragon for.. well, the spring time. It should be available from the first day of spring up until around the middle of June.
The Spring Dragon has a base breeding time of 24 hours, sells for 1,500,000 coins, and earns 25,000 XP for successful breeding once you reach level 11.
To breed a Spring Dragon, you just need to breed dragons that contain all three Cold, Fire, and Lighting attributes. For example, Hail + Fire, or Storm + Fire should be good combinations to use.
Need lots of gems at a cheap price? You can actually buy DragonVale gems on Ebay.