Flowering meadow exercise in watercolour pencils

I used a photograph as a starting point for this - partly because I wanted to do something similar to one of the exercises in Watercolour Pencil Magic so I could learn and be a bit more disciplined about the process. This time I dried each layer before moving on to the next. I like the way the flowers recede into the distance and I like the trees individually but they don't really work in this composition as they are too much 'garden cultivated' trees rather than wild. I have to confess I did deviate from the photograph and just got a bit carried away with trying out different ways to paint foliage. Still that's okay - it was meant to be a learning exercise not a piece of art (I have to keep telling myself to let go of the need for things to be perfect every time...) Looking at this now I don't think have got enough of a value range - I found it difficult to get the darks and if anyone has any advice it would be much appreciated. I think perhaps I should have carried on layering?????