Plants for shallow soil with sand sub layer
Our garden is fundamentally a slope that has been terraced by filling up the void with sand. There is good quality top soil of around 15cm/6" (years of rotted leaves) and i have room to raise this a maximum further 5cm/2" to a total of 20cm/8" before roots would reach the sand.
I assume this is not good!?
In addition to planting bulbs (as they grow upwards not downwards is the theory here?) and plants in pots:
Can anyone please recommend any plants, grasses, trees, shrubs, perennial, biennials, annuals (anything!) that would actually enjoy these conditions?
To add to the complications its woodland edge/partial shade kind of lighting conditions.
Plant names, links and anything useful gratefully recieved.
Much appreciated and thanks in advance.