A tripod also lets you keep the ISO low to minimise graininess. A telephoto lens can have the effect of shortening perspective and compressing the view, which makes it look like the blooms are more compact. Adding a circular polarising filter to your lens will remove glare or sunlight reflections, which will add depth to the blues and greens.
Avoid damaging the subject
It is important to avoid accidently damaging the plants with your camera equipment, or your feet. When plants are trampled, not only does this reduce the enjoyment of others, also the bluebell bulbs can’t produce enough energy to survive and to flower the following year, so they die.
However, by shooting from a low angle it’s easy to create the illusion that a person is sitting or standing amongst the bluebells when they are actually out of harm’s way on a footpath. Look for bends in the paths or junctions if you want flowers in the foreground as well as behind your subject.