No short cuts I'm afraid. One at a time.
Careful where you get your bulbs from. It's illegal to dig wild bluebells up, even with the landowner's permission (most other plants are only illegal without permission).
If you buy them from a nursery, you are quite likely to get Spanish bluebells, or more likely the hybrid with our native ones.
You could try collecting seed from wild bluebells, and scattering it -- quicker to do and the species is reliable -- but you'll have to wait a few years for flowers.