how to train 1 gallon pittosporums as hedge
Hi everyone. I planted a bunch of 1 gallon Pittosporum tenuifolium 'Marjorie Channon' with plans for approximate 4 ft wide hedge(and 6- 8 ft tall). I have only grown informal hedges so I am not quite sure how to get this to to the desired height and width. When do I start shearing, do I shear just the sides, or the top too and do I need to stake them?
Thanks so much!