Naysen,
When the plants start to outgrow the tops of the cages, I will top them to encourage them to bush-out more. Most of my varieties like Extreme Bush, etc. are said to be in the 2 foot range. The 2 Dwarf Project plants (Iditarod Red and Rosella Purple) will be trimmed to a 3 foot height.
Last year, I ended up with this out-of-control situation:
I won't let that happen this Season.
Raybo