FYI - Austin Community College has Landscape/Hoticulture Classes!
Wow, this is great news! Has anyone taken these classes?
It looks like they can lead to certification too. Not sure if any of them can be done online, but the classroom offerings look great for both hobbiests and the professionally minded students.
Here's the class schedule for Spring.
And the main web page is here:
Here is a link that might be useful: Austin Community College Landscape Classes