Hello I was just wondering if still had to take care of your spanish tree after you finish it. If you can let me know That would help me a lot.
Think of it as a real tree. If your apple tree grows apples, do you just stop watering it? No, you keep going to keep on getting more apples. Just like the Duolingo trees, you complete it, but that doens't mean your fluent, you have to keep practicing to get more fluent on the language!
I've kept mine golden for over a year now. I admin a club for people who have finished the Spanish course but want to maintain their gold tree. It takes less effort to maintain it (don't have to work at it every day). Duolingo does seem to come up with new vocabulary words and sentences so it keeps me interested (and makes me review old skills as they lose their status).
But really it is up to you if you want to or not. My goal now is to get my golden "languages" to level 25... after that I guess I will look for another goal :)