Q.Which Shallow Root Border Plants Thrive In 10cm Of Soil Next To Low Garden Wall?
Just removed 6 metres of Leylandii hedges from border. In doing so revealed garden wall concrete foundation. It is 20cm wide and 10cm below border soil level. Will anything grow in such poor conditions?

Certified GKH Gardening Expert
These articles will help you to find selections that will do well with very little room and little soil:
https://www.gardeningknowhow.com/special/urban/fall-gardening-in-small-spaces.htm
https://www.gardeningknowhow.com/garden-how-to/info/plants-for-cracks-crevices.htm
https://www.gardeningknowhow.com/special/urban/gardens-in-small-spaces.htm
https://www.gardeningknowhow.com/special/best-balcony-plants.htm