good wildflowers for low Victorian garden wall?
I have inherited a lovely, 3 ft high Victorian garden wall - it's lovely and rough, with moss growing here and there. Have transplanted some sedum cuttings onto it, which are taking well, but wanted to know if anyone has any other tips for good, smallish wall plants which are native and also growable directly into the wall from seed? I have sprinkled some toadflax (Cymbalaria Muralis) around, but no sign of any shoots yet. Did I do something wrong? Any other good seeds to try? Thanks!