so what are u growing ur plants for if ur not gunna use or sell it???

Mrs Greenjeans has the right idea tho.. LST (low stress Training) Is very easy, inexpensive and usfull way to grow ur plants.
Topping will save u some space and can generate a bit more bud if thats what ur lookin 4. It can also make ur plant slightly bushier on the top if u do it more than once like an upside down pyramid...

Incase u didnt know or havent researched it yet, Low Stress Training is whn u bend ur plant over and ty it down. If you do this repetidly it creates new shoots and makes a low lying bush. (basically)

Gd luck
Pezzo