Conifers create dense shade and inhibit the growth of bluebells, wood anemones and other wildlife found in deciduous woodland.

They like semi-shade, ideally, as dense shade can reduce flowering.

That's the trick, then, for spring bulbs: good spring light and no smothering or dense shade, moisture during the growing season and a dryish, but not desiccating, summer season.

Its large leaves create dense shade, preventing other species from germinating or growing.

The tree canopy casts dense shade, and carpets the ground with dense leaf litter.