Shrubs, perennial or ground cover plants under the hedge?

What type of plant would you recommend for under the hedges on the side of the front path? I would prefer something very low maintenance and drought tolerant, and that is compatible with the Murraya hedge since they will be living so close to each other...

By low maintenance, I mean something that doesn't need regular cutting, trimming etc... if there is such a plant *shy*

We plan to keep the hedge at either 600mm or 1m high.

Also, although I would prefer a green and possibly white garden I am open to suggestions as to which colour perennials would work well with our red brick facade.

Choisya ternata

White evergreen azalea

White rhaphiolepis

Gardenia Augusta Florida

English lavender

PS. don't forget to enter my giveaway for your chance to win one of three organic lip balms.

B