Where the Lilies Bloom (1974) starring Julie Gholson (her only film), Jan Smithers, Sudie Bond, Rance Howard (Ron and Clint's father), Harry Dean Stanton
From Amazon.com review: Mary Call Luther is living happily with her father and three siblings in the remote Smoky Mountains of North Carolina when her idyllic childhood ends abruptly. When her father dies, she emerges as head of the household and must be even more responsible than her older sister, Devola. Her determination to keep the family together is a real inspiration ... Mary Call is determined to fulfill her father's wishes and finds ways to keep the family together, no matter what. Together they learn to gather and prepare medicinal herbs. While they are "wildcrafting", they also have to attend school and keep the death of their father a secret so that the family can stay together.