Gardening, a learning curve

When I planted this flower bed last spring I thought I'd do it Mother Nature style.
In other words I got lazy after planting the lily bulbs and simply scattered a lot of different seeds willynilly. Then covered them lightly with compost, watered and left them to it.
The result is the chaos you see in the photo, not too bad but because I had no idea what was what when they were growing (being a bit of a beginner at this gardening lark) I didn't do any thinning out.
So the poor things were totally overcrowded and all grew very tall and spindly trying to get enough light I suppose.
Well I'll know better next year and give them a little more breathing space!