Diane Jean Lucas ONZM (born 1950) is a New Zealand landscape architect and environmental planner known for her conservation works, and particularly in and around Christchurch, Banks Peninsula and the Canterbury Plains and South Island High Country.

[1][2] Lucas grew up on Bendigo Station in the Otago high country, and learnt about conservation early from both her parents and the rugged landscape.

[2][3] In 1971, she achieved a Bachelor of Science in botany at University of Otago and went on to complete a postgraduate diploma in landscape architecture at Lincoln College.

[2][3] She set up a practice in Geraldine advising rural landowners on sustainable management, and is the director of Lucas Associates Limited, now based in Christchurch.

In addition, the booklets provide a guide for nurseries and the public about which native trees, shrubs, climbers and groundcovers naturally belong in different areas.