Book an appointment with Jason

Lead Horticulturalist, Flora Grubb Gardens

Northern California Sales Representative, Grubb & Nadler Nurseries

Author, Designing With Palms

Jason Dewees, holding his book titled 'Designing with Palms' at Flora Grubb Gardens San Francisco

Jason is our Lead Horticulturalist, an internationally renowned Palm Expert, and one of our most senior staff members.

Jason works as a horticultural consultant for landscape designers, landscape architects, municipalities and horticultural gardens. He has offered guidance to the Conservatory of Flowers, Golden Gate Park, the University of California Botanical Garden, the City of San Francisco, the Presidio Trust, the San Francisco Department of Public Works, and the San Francisco Botanical Garden, trained volunteers and docents, and has propagated thousands of trees. 

He has lectured at the California Horticultural Society, The Huntington Library, Art Collections, and Botanical Garden, the Marin Art and Garden Center, the Mill Valley Outdoor Art Club, the Sherman Library and Gardens, and the Garden Conservancy.

Jason joined the Northern California Chapter of the International Palm Society as their youngest member in 1986, and has served on the council of the California Horticultural Society, as well as on the Horticultural Advisory Committee of the San Francisco Botanical Garden, and the Advisory Council of the Conservatory of Flowers. Born and raised in San Francisco, he graduated from Wesleyan University in Middletown, Connecticut.

Book cover titled 'Designing with Palms' by Jason Dewees with photographs by Caitlin Atkinson, showing lush green palm trees in a garden with a white building with large windows in the background.
“Jason has been a valuable partner and resource in our work together on Treasure Island. His passion for horticulture brings an infectious energy and enthusiasm to the work. His knowledge of palm trees and botany, from procurement to installation and maintenance has been critical to the success of our projects.””
— Will Benge, CMG
Jason Dewees, horticultural consultant for Flora Grubb Gardens, selecting Washingtonia / Robusta hybrid palm trees.
“I found working with Jason to be a total pleasure. His vast and remarkable knowledge of plants is a deep and wonderful resource. He contributed to my project creatively, with helpful insights, and not least to mention logistically.”
— Oliver Keralis, Oliver Gardens
Oliver Keralis in a garden he designed with plants from Flora Grubb Gardens San Francisco
A group of tall palm trees in a park or garden setting during sunset, with a clear sky and some other trees in the background.
A group of palm trees, some with dried fronds hanging down, set in a desert landscape with other desert plants and cacti under a clear blue sky.
Photograph of a palm tree on a rocky hillside overlooking the ocean, with distant cliffs and blue water in the background.
Jason Dewees in a lush palm grove with tall palm trees at Grubb & Nadler nurseries.
A collage of tropical scenery, including lush green jungle paths, silhouettes of palm trees at sunset, and various tropical plants and trees.

Jason in The Press

Jason Dewees of Flora GRubb Gardens wins an award for his book, Designing With Palms.
The word 'Sunset' written in orange, stylized text on a white background.
Silhouette of numerous tall palm trees against a sunset sky with pink, purple, and blue hues.
Lush garden pathway surrounded by green plants, flowers, and trees with a small house wall visible on the left side.
The word 'Sunset' written in orange text with a white background.
Garden designed by Jason Dewees of Flora Grubb Gardens includes A fermob garden bench and trachycarpus wagnerianus.

Snapshots From Jason’s Customers

A swimming pool with clear blue water surrounded by lush green trees, potted plants, and tall palm trees, with orange lounge chairs and umbrellas on a patio area. Jason Dewwes for Flora Grubb Gardens.

Jason works with some of California’s best landscape architects and garden designers, providing horticultural consultation and sourcing plants, especially palms, for their projects.

Freshly planted washingtonia
Construction workers and machinery installing new palm trees along a city street with a green bike lane, under a clear blue sky.
palm tree with fuchsia

Jason helped with planting details, specimen selection, and tree placement on CMG's design for Avenue of the Palms on Treasure Island.

Close-up of a pineapple plant with a developing fruit, showing the base of the spiky leaves and the young pineapple stalk.
“As a native San Franciscan and expert horticulturist, no one understands San Francisco’s unique microclimates better than Jason. Shopping with Jason is always a pleasure as he effortlessly navigates the nursery while brainstorming and educating. His advice has help turn our long neglected hillside backyard into a verdant escape from the city with endless praise from our neighbors.”
— Wes Tindell

On CMG's Clipper Cove installation on Treasure Island, Jason helped with planting details and tree placement.

Two children exploring a dense jungle path with tall palm trees and sunlight filtering through the leaves.
Close-up of a green plant leaf in a garden or field, with other greenery in the background.

Jason helped select specimens for CMG's Treasure Island project.

Three large potted palm trees in bright orange planters along a sidewalk with decorative grasses and a concrete wall in the background.