long low narrow planter along the front
had this balcony setup just on the sea coast in Finland, not much benefit. In the end, terrace shelves against the wall and planters on the floor are different only in aesthetics. Just had a lot of plants and birds - make sure you have some attractors to those (scatter some food, leave nest building material, place a cat behind the window to be mocked) - still lost plants quite often to elements and larvae.