Hi I'm driving myself mad and hoping for some help as I find there are so many clever people on these threads. I would love to transform my back garden to have colour and shrubs and trees. Currently it is very plain and I don't have much luck with potted plants. I tried to dig holes under the membrane under the stones but the earth underneath seems to be clay? It's really wet and grey. Not the deep brown I was hoping for so I filled the holes back in. I need advice if possible about whether I can plant under the membrane and also for some ideas for fast growing shrubs and plants for the garden. I've attached some photos of this helps at all. Really appreciate any help.