Hi all,
Firstly, I must state I'm no gardener. I've never had a useable garden before so this is all a bit new to me.
We bought this house in August last year after falling in love with its unusual feature. The house has spent many years as a rental so people have mowed the lawn and that's that. Very little has actually been done to introduce any colour in here at all.
I know we have a huge expanse of beautiful pink water lilies as they were open when we moved in, but other than that there is no colour.
Around the banks are reeds and grasses which we will keep for the wildlife (we have ducks that spend a lot of time in there).
I've used google maps. The key is as follows:
Pink outline is our front garden. We have a small patch to the left of the picture where it doglegs back. I'd planned to let this small patch grow wildflowers and plant some lavender type plants there for the bees.
Red circle is a huge, beautiful willow tree.
green is a small tree, not even sure what it is, and to be perfectly honest I only actually noticed it a few weeks ago 
blue is a newt habitat. We were told the pond was protected for great crested newts and this habitat, which is section of rockery like boulders, was put there when the house was built to compensate. Local council however have no record of this. Either way, we do have newts (not great crested that I've seen) so this needs to stay for them.
My brief is I want colour! There are going a row of hawthorn bushes in the top middle as we have had the odd issue with kids sneaking through the fence but other than that it's a totally blank canvas and I have zero idea where to start.
Suggestions desperately needed on what to plant, where and when!