Ideas for narrow space
Please help with ideas for a narrow space in my backyard. I want to replant/remove existing plants and plant something upright 2-3 meters height to the planting boxes in my backyard (upper row in the picture) - something pretty which could help with screening and make my backyard look nicer and tidier... The space is quite narrow so I'm not sure what would fit there :-( I thought about feijoa but I can't find on the Internet how would it fit in there.
Gardening zone is 10b (New Zealand).
I'm quite new to gardening, any advice would be very appreciated.