I wondered the same thing and then thought about how trees in a crowd are usually tall and skinny, versus how single trees are shorter and bushier. I think by "smaller," they meant shorter. More space means less competition for light, so a shorter (but maybe bushier) plant. That's what makes sense to me anyway :)
I wondered the same thing and then thought about how trees in a crowd are usually tall and skinny, versus how single trees are shorter and bushier. I think by "smaller," they meant shorter. More space means less competition for light, so a shorter (but maybe bushier) plant. That's what makes sense to me anyway :)