Using tea bushes as a fences is something I tried, creating a wide space for my animals. However, I couldn't keep them very long.
I have a real passion for tea and even in-game, I can't help myself to consider tea bushes more a as a way to get tea than convenient fences. Thus, each last week of the season, my priority was to harvest tea leaves. Many, many of them. And it was greatly perturbing my daily farming chores.
Hardwood fences are easier, for me at last.