I can't give you any advice Luckygirl but well done! It sounds fabulous and the pollinating insects must have loved it. I have a long, quite steep, bank above a waist high wall down the side of the bungalow and I'm hoping to do something similar. Because it is steep and very stony I won't dig it over. I strimmed it very close a few weeks ago and raked everything up. Now I pull as much grass as I can and make little holes for the seed I have been saving from around the garden, (corncockle, marigold, love in a mist, poppies, snapdragon etc.) Some of it is coming up already but I have plenty saved for spring. It is a bit of an experiment and will be a mixture of wildflowers and garden flowers.
Did you remove all the grass before you started, and what flowers have you put in?