The Secret Life of
Plants, by Peter Tompkins and Christopher Bird.
A stunning account of plant/people interactions, using scientific methods that measure physical, emotional, and spiritual responses between plants and humans.
Raising With The Moon, by Jack Pyle and Taylor Reese, explains the logic and lore of gardening according to the phases of the moon -- a complete reference and probably more than you ever wanted to know, but a good guide.
Plant Spirit Medicine by Eliot Cowan. Walk with Eliot into the ancient healing practices of the Huichols. Learn how to invite the spirit of the plants in your own backyard to become allies in healing.
Growing Myself by Judith Handelsman. A lovely "coming out" book in which the author admits talking to plants and the gradual awakening to their sentience. The interconnections of all life become real in this book and the plants teach, helping us to develop our own "inner garden."
Bringing A Garden to Life by Carol Williams.
Earth Prayers, edited by Elizabeth Roberts and Elias Amidon. 365 Prayers, Poems, and invocations for Honoring the Earth.
The Healing Garden by Sue Mintner introduces both the historical and present uses of plants for healing. Pictures and text present the garden as a haven for body, senses, and spirit.