Help/ideas for narrow space

[Nsmirnova]

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.

 

[Beverly]

What is the width you have to work with? and what depth of soil is available? Does the location have full sun, part sun, filtered sun, morning sun, afternoon sun, mostly shade? Herbs are good at fitting into tight spaces, but i'm not clear where in the photo you want to plant. If it is the lowest section, that doesn't look like 2-3 meters to the upper level.

 

[LIcenter]

Ever here of Kangaroo paw? It would probably do very well in your situation.

https://www.gardenia.net/plant/Anigozanthos-Kangaroo-Paw

 

[Nsmirnova]

Thank you for all replies
I've just measured the width - it's only 37 cm.
the depth of soil is not a big problem there, there is nothing under the boxes as far as I know, just soil.
It gets morning sun, I want to plant in the upper section

 

[Becky]

I think climbers would be lovely - you could either string wires along the fence or fix some trellis in place, and pick a variety of different ones that bloom at different times. Could be very pretty!