Large chunk of lawn in sunny s/w facing really boggy spot. I have never grown plants in a bog garden and know that Gunnera will be too big and don't like dark green nothingy type plants. Apart from Irises and Astilbes, and ideas? Hostas/Ferns and Cornus are thriving there. Is there a small type opf Gunnera plant that I could try?? All ideas welcome _ I dont want to drain anything as this could be a soakaway for the house. Only been here a month!