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

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
March 2026
Latest on Substack
If you are paying attention to the weather through the USA this week you’ll have noticed just how capricious it’s been. “In like a lion, out like a lamb” seems too calm a prediction. But for cannabis, that doesn’t matter because cannabis should not be in the garden at all right now. It’s too early, even if you live in California where temperatures are running 20 – 25 degrees above normal (which is eerily hot, BTW). Cannabis is a photoperiod plant, and it’s too early in the year to plant outside even if the days are nice and warm. You’ll need to wait at least until after the vernal equinox, which is just around the corner. So what’s an eager cannabis gardener doing right now? Getting educated, of course. Here’s how you can up your cannabis gardening game: continue reading…

March 14 11 am – 12:30pm
Berkeley Herbal Center
Join me at Berkeley Herbal Center for a fun and informative workshop where you’ll craft your very own herbal mints!
We will make delicious custom dosed CBD chocolate hearts. This class will provide grounding information about cannabidiol (CBD), an important molecule found in cannabis that offers soothing aid to the body mood without the high. Each participant will then create their own custom dosed batch of 50 tiny CBD infused chocolates to take with them. All equipment and ingredients are included.
Berkeley Herbal Center. 1250 Addison Street, Ste. G, Berkeley, CA 94702
“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

