Hedge front garden - will anything grow in planter?
Heya, I was meant to have a hedge on the left side of the door, but the builders found out that it was cement foundations and not really possible to dig a trench! Thinking of maybe building up some sort of planter there, but as I still would like privacy not sure is there any hedge type or bush what could grown in a planter? I probably could build it up 40/50cm.. any other ideas?

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As @KeenOnGreen says, privet will definitely do well enough. Make sure you have proper drainage holes in the bottom too.
Alternatively, you could use posts at each end of the planters and add trellis for climbers. There are lots of clematis which will grow in well drained conditions- the earlier flowering types - alpina, macropetalas etc, like a lighter soil than the bigger flowering, later types.
I live in west central Scotland - not where that photo is...
Even with our rainfall here, bamboo doesn't do well in planters, and I feel that people think because of the rainfall, they don't need to water.
The guy across the back from me has put his in raised beds. They're ok, but they really don't look that nice. There are many, far better choices.
If it's a bit shady, Osmanthus will do well. Mine is in a narrow raised bed, and is very wet in winter, but just now - it's really quite dry in there because we haven't had the usual weather for April. It's beautiful at the moment too - covered in it's little scented flowers.
I live in west central Scotland - not where that photo is...