Posted: 26/11/2015 at 08:43
Hydrangea petiolaris is Not a great plant for your neighbour's wall Jo and it will need support. Very vigorous too. Growing up a sycamore? Have you seen the size of the stems after a few years? They are very thick and inflexible and look awful in the dormant season.
Pittosporum Tobira would do well there Jo...evergreen and highly scented. pittosporum garnet too ....scented flowers, evergreen and grey foliage.
a variety of free standing plants....holly like Golden King would look and do well there. Lonicera purpusi...I grow a variety called Winter Beauty.....is evergreen, highly scented from now for several weeks and grows quickly and vigorously.
growing free standing plants leaves your neighbour happy his wall is not attacked