I haven't tried /electric yet, but my first 50 was a plant/fire Dom.
I love Plant Control. It's a very strong set. Seeds is a powerful AoE soft control that can let you pull off some amazing things. And Carrion Creepers is to me one of the most unique powers in any Control set. And what's not to like about having your very own Audrey II following you around? 
I made a Plant/Elec build on mids. I would just like to know. What are some of the likes and dislikes are about the powerset that I have chosen. Either way I will be making this because it's a cheap build with permadom lol.