Hi Adam, Welcome to the forum. Glad to have you. Cecil is a trout expert and he can possibly give you the best straight forward info on the trout. There are many others here that can also give you alot of good info on them as well. I can only throw a few things out that can get you thinking about it a bit more.

I added trout to my pond in Ohio for the first time this fall. In Ohio, with an average pond, I guess that I can not expect them to last year round ( and it is spring fed). Most likely from October to April. I would think the season may be shorter for you down south. Water temp is a big concern. I cant remember what that magic number is. Springs can be colder, but aeration and water flow is a big consideration also.

Use the search features to look for past posts. You will be amazed with all the info stored here. One post will lead you to another one, and so forth. You can get lost for days with the reading. So here are a few questions that may help others guide you more, once they know your situation better.

What is the GPM of the spring?
Do you know what the temp of the water is? How about during the summer?
Can you aerate?
Does it matter to you what kind of trout?
Do you have a water source that can add to the spring flow if needed?