Posted: 29/07/2013 at 15:19
plant Gunerras, there are lots of different ones around, also ligularia, they will love a boggy bottom (pardon the pun)
Flag Irises are great as well if you just want to plant it up. We had a spring in last house - in the garden I mean! - which fed the ponds and we had loads of them there and also where the ponds gradually fed back out into the field and road etc. Marsh marigolds will be happy too and there are lots of rushes and other pond/bog plants you could get quite easily which will colonise the area - we had loads of ferns . Beware of watermint though unless you put it in a container- it's just as invasive as all the other members of it's family!
The Irises and Marigolds are practically evergreen too - they start into growth early in the year and last well into Autumn.