Been in the ground for a couple of years and about 2 metres - it has a cane about 3/4 of the way up, now it has foliage after winter it seems to take the brunt of the wind and is bending quite a bit.
Would you expect to put in a larger cane as it grows higher and higher or would you put two canes meeting at the top.....must admit, I never thought about this and assumed it would not need support - worried about it bending right over or snapping near the top which is fairly unsupported.
see pic