I left my Hackberry in the ground with the bamboo pole still attached. What a lesson lerned. The tree grew nearly twice the height in one growing season but, needless to say, was not strong enough to stand it's 14 foot trunk erect after taking the pole out. I regret doing so, but I ended up topping it at about 8 foot so it can stand erect with no use of stakes or poles. Question: did I ruin it's natural height expectancy by topping it?