Cannabis Author and Educator

“Penny Barthel strikes the perfect blend of science and beauty in this most approachable guide to growing cannabis in the garden. Your hand will be held from start to glorious (vanilla bean-infused gummy) finish.”
Johanna Silver, author of Growing Weed in the Garden
Check out my interview with Homegrowers International founder, Michel Navedo

Book

Ten Speed Press/2021

Purchase here

The Cannabis Gardener teaches you how to choose which strains are right for you and how to cultivate the plants from seed to finished flower. Gorgeous full-color photographs capture each stage of the growing process and show how cannabis plants can be incorporated into your garden design as well as raised beds and containers. After you establish your plants in the garden and monitor them through the flowering stage, you’ll find tips on how to harvest, dry, cure, and store your “grow.” Also included are recipes for savoring your harvest, from salves, tisanes, and tinctures to cannabutter for baking and cooking delicious treats such as CBD gummies flavored with vanilla beans, cheddar crackers, and even cannabis chocolate sauce.

The Cannabis Gardener is an accessible and practical guide for any level of gardener interested in growing their own attractive cannabis plants.

New post

February 2026

Latest on Substack

When the name “marijuana” is in the title of a piece in a mainstream media outlet I can predict what the narrative arc will be: the story is encoded in the name. This NYT opinion piece: “It’s Time for America to Admit it has a Marijuana Problem” boldly confirms my theory. In this story the term “marijuana” is included 37 times whereas the term “cannabis” shows up once at the tail end. Others have given good enough reasons for the eye-rollingly predictable thrust of this article, so I’ll offer here one perspective that I hope will add productively to our nation’s important discussions about cannabis.

February 18 – 21

NWFGS

For the first time ever, our nation’s largest garden show, the Northwest Flower and Garden Festival, will have high quality cannabis seeds AND my book The Cannabis Gardener for sale. Please join Dr. Emily Gogol and me at Booth #205. This is a perfect excuse to go to Seattle and see an amazing flower show! We are absolutely thrilled to be part of the Northwest Flower and Garden Festival. It’s like the Chelsea Flower show, but in the U.S. and on the West Coast!


“If plants have IQ, cannabis is a genius. This lovely and practical book gracefully describes how to cultivate, support, encourage, and manifest the genius of this remarkable plant.”


David E. Presti, professor of neurobiology and psychology, University of California, Berkeley