The second last stage of holly bushes have green insteed of red like in the last stage. It's rather pretty. You would have to put them in sand to keep them that way. I didn't think to do that though, so I have no pictureThis was likely an issue of the word purple being too long, or they made a mistake in the localization because if you play the game in Japanese they're called purple azaleas. Can't speak for other languages but I'm guessing its the same.
And I love thats they're giving us more color options with the bushes! I can't have pink bushes everywhere haha. But I hope they make one with green flowers like the mums