I know this may seem odd but... My tomato plants are growing like crazy in my green house. As of July 3, many of them are well past the 6 foot stakes they are tied to. I lost the top of one plant that was about 9 feet tall. Should I just top them? They are already quite bushy plants... I would use larger stakes but, the green house roof is only 9 feet high where these plants are being grown.