I am glad you added that Belongins as I was worried you had a problem with chromatic aberration (fronging around areas of high contrast) as the tree has lots of that against the sky. However, having done this with a mobile phone camera, most of which have a tiny little lens on, I think you have got a very creditable shot from it.
You definitely did the right thing to get down very low and shoot from the level of the bluebells. I think I would have actually moved that highest flower right in front of the trunk as it is a bit distracting. Without it, the main focus would be on the darker and stronger coloured flowers on the right which stand out nicely against the green of the grass and then are complemented by all the bed of bluebells that spread across the picture from there.
Well done, a good effort there. Keep going, you've got at least a couple of weeks before the bluebells are gone so I am sure you can get some other good shots in
Cheers,
Rob