This is what you get when you google "living gate". Amazing work from a guy named Brad Hankins from the Pacific NW.

You also get this gem of an idea! You can circumvent an HOA rule that says fences and gates can’t be taller than 6 feet.

[caption id="attachment_1105" align="aligncenter" width="400"] Among this garden’s most interesting features is the living gate at the end of the remaining blacktop driveway. It rolls open to let you in and rolls closed for privacy. Like the planter sitting behind the bench in the backyard, this structure starts with a galvanized horse trough filled with soil and planted with arborvitaes. The trough measures 2 feet high and deep and 8 feet long and cost about $140. To move it, Jon built a wooden brace for the bottom and attached an old piano dolly he had in his basement. Using this planter allowed Jon and Dale to circumvent a neighborhood rule that says fences and gates can’t be taller than 6 feet.[/caption]