not from my experience, but i guess it depends how big they are when they begin flowering. if u got a plant thats only a foot tall ya it might triple, but sorry a 7ft plant will not triple or even double in my experience. im expecting maybe 2ft of growth on my plants that are over 5ft. they really only continue to stretch for like the first month of flowering then it slows down drastically.
Oh dam makes me a bit worried for security and damn my plants are gonna be tall . I always have helicopters scoping my area out because i have a tramendous amount of people how grow in my area !