Holly Shimizu

Garden Consultant


Holly's herb garden in Lewes, Delaware was inspired by early American herb gardens. She harvests herbs and creates various herbal products including teas and distilling herbs to produce hydrosols and essential oils.


Anamorphosis, a design by Francois Abelanet at Radice Pura, a horticultural park and nursery in Carruba, Sicily


The U.S. Botanic Garden as viewed from the Bartholdi Park.
Holly was the Executive Director here from 2000 through 2014.


Holly H. Shimizu is a nationally recognized horticulturist, consultant, and educator living in Maryland. With a rich background in all aspects of public gardens, extensive experience leading garden tours and workshops, and a proven commitment to plant conservation and sustainability, she has been making plants and gardens more accessible and exciting to both professionals and amateurs for over four decades. Holly consults public gardens and helps individuals envision and create peaceful and sustainable gardens. She also lectures and writes on a variety of horticultural topics and leads gardens tours, locally and around the world.  Read Holly’s blog here and see photos of her gardens and garden tours here.

Holly Shimizu fountain

Current Projects:

Currently Holly is leading the Environmental Committee for Glen Echo, Maryland to head efforts for healthy lawn and landscape care, sustainable garden efforts, and coordination of environmental programs.

Holly was a contributing author for a new book called Living in the Anthropocene – Earth in the Age of Humans, published in 2017 by the Smithsonian Institution.

Holly is now on The Board of Trustees of The American Botanical Council, publishers of the magazine Herbalgram, based in Austin Texas.

Holly is on the Board of Directors of the American Horticultural Society (AHS). The AHS connects people to gardening, raises awareness of earth-friendly gardening practices, introduces children to plants, brings together leaders to address important national issues, and showcases the art and science of horticulture. Please visit their website for more information.

Holly Shimizu and colleagues
Holly Shimizu on New Zealand trip

Swan’s neck, Agave attenuata, in park in Taormina, Sicily