Woodland Wildflower Garden Patch
I have a roughly 15 square metre patch in a shady part of my garden that I would like to turn into a woodland wildflower patch. It gets around 3 hours of sunlight in the morning and is then shaded by a tree for the rest of the day. My current thoughts are planting Primrose, Bluebells, Red Campion and Sweet Woodruff. Now I've only chosen these since they're the most common/prettiest and are safe for cats, so I don't know if they work well together or if the arrangement would look nice. What would you guys suggest for a small woodland wildflower patch? Also I would need to make a 2m x 7.5m bed on top of the concrete so how deep would it need to be and what sort of soil would I require?