Charlotte Milliken Hoak (1874-1967) was a 20th-century teacher, horticulturist, occasional botanist and garden columnist in Southern California. She advocated the use of native plants for landscaping public places including roadsides because they were best suited for the environment and did not draw on scarce water resources. As a teacher she taught organic gardening and composting techniques to her elementary school students and members of the community. Charlotte received recognition and awards from several plant societies, garden clubs, and well known botanists and horticulturists with whom she worked. Her contributions to the field of horticulture and her advocacy for the conservation of natural resources and preservation of wild-lands is documented and warrants recognition.