I'm new to planted tanks, so please excuse this very simple question ... my Wisteria is getting close to touching the surface of the tank (grown about 3 inches in the last week or so since the tank has been setup ... and it's a low tech tank) ... so in another week or two I will probably need to trim it unless it just stops growing when it runs of of water ...
Assuming it doesn't simply stop growing when it's out of room, how should I trim it? Is there a specific point as which I should cut it? Is it best to cut it or can I simply try to break the stem? What happens to the plant when I trim it ... how does it continue to grow?