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UC Master Gardeners • Napa County

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Heirloom, Open Pollinated or Hybrid Tomato
Article

Tomatoes: Heirloom, Open Pollinated or Hybrid?

February 23rd, 2025
Heirloom plants, by definition, have some history behind them. Some say an heirloom variety must be at least fifty years old, some say even older. Heirloom seed is described as being from a plant variety that has been passed on through generations.
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Common manzanita (Pinterest.com)
Article

Manzanita, versatile California native.

February 22nd, 2025
By Cindy Kerson, UC Master Gardener of Napa County Native to North America, manzanita (Arctostaphylos spp.) comes in many shapes and sizes. It can be a tree, a shrub or a ground cover. A manzanita tree can reach 20 feet in height, while the ground cover may only be two inches tall.
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Medical entomologist Bruce Eldridge in 2007. (Photo by Kathy Keatley Garvey)
Article

Entomology World Mourning the Loss of Bruce Eldridge

February 21st, 2025
The entomology world is mourning the loss of UC Davis Professor Emeritus Bruce Eldridge. As a medical entomologist, his exemplary military, academic and administrative career spanned more than six decades. He died Wednesday, Feb. 5 in Davis at age 91. Dr.
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A honey bee pollinating an almond blossom. (Photo by Kathy Keatley Garvey)
Article

Tough Time for Beekeepers and Almond Growers

February 19th, 2025
It's a tough time for beekeepers and almond growers during California's almond pollination season. There's a nationwide bee shortage, rapidly increasing hive thefts and often uncooperative weather.
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Anytime Bob's in the garden is a good time to chat about roses.
Article

March is Rose Madness Time

February 17th, 2025
Roses have been around quite a while, first debuting in fossil records dating back 60-70 million years. Even Confucius loved and wrote about roses. Of more historical inerest, Alexander the Great is credited with introducing cultivated roses to the rest of Europe.
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Amaryllis comes in colors! (seedsnpots.com)
Article

Amaryllis

February 15th, 2025
by Penny Pawl, UC Master Gardener of Napa County Last year at holiday time I was given a most unusual gift: an amaryllis bulb encased in wax. I had no idea such a thing existed, so I immediately looked online for how to care for it.
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Lady beetles, aka ladybugs, are a crowd pleaser on Valentine's Day. (Photo by Kathy Keatley Garvey)
Article

Getting the Red In: Happy Valentine's Day!

February 14th, 2025
Someone once said that "red doesn't tiptoe into a room; it kicks down the door." Red is bold, fiery, and confident. It's also a warning: think stop signs, traffic lights and fire engines. Don't blow through a stop signs or red traffic light, and please pull over when you hear a siren.
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Professor Phil Ward, an ant specialist with the UC Davis Department of Entomology, responds to a question below a sign that reads "We have the Antswers." (Photo by Kathy Keatley Garvey)
Article

The Phil Ward Ant Lab: They Provided the 'Antswers'

February 13th, 2025
It's Saturday, Feb. 8--the 14th annual UC Davis Biodiversity Museum Day--and you're heading toward the Academic Surge Building on Crocker Lane, home of the Bohart Museum of Entomology and the Museum of Wildlife and Fish Biology. You want to see the displays and chat with the scientists.
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A Gulf Fritillary (Agraulis vanillae) nectaring on a Mexican sunflower (Tithonia rotundifola) in a Vacaville garden. (Photo by Kathy Keatley Garvey)
Article

A Bright Spot in the Garden...

February 12th, 2025
Widespread rain, strong winds gusting 30 to 40 miles per hour, dangerous surf, hazardous roads, flood watch, maybe power outages. That's the weather warning tonight.
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Rainier’s shade garden. See article for plant names.
Article

Creating a Beautiful Shade Garden

February 8th, 2025
Shady areas in a garden tend to cause a lot of head scratching. These spots often confound gardeners who haven't yet learnedthat many attractive plants thrive in dry shade. Some shade-loving plants have colorful foliage that provides as much delightas a bright flower patch in full sun.
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Award recipients include (top row) Professor Jason Bond and doctoral candidate Mia Lippey and (bottom row) Professor Douglas Walsh of Washington State University, a UC Davis doctoral alumnus; and UC Davis undergraduate student Kaitai Liu.
Article

Congrats to the PBESA Award Winners!

February 5th, 2025
Congratulations to all the newly announced recipients of awards from the Pacific Branch, Entomological Society of America (PBESA)! Honors well deserved! Capsule information on our four UC Davis-affiliated award recipients: Professor Jason Bond, described as a powerhouse in the world of systematics a...
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UC Davis distinguished professor emerita Diane Ullman (left) and Gale Okumura, lecturer emerita, Department of Design, stand in front of their project, "A Bird's Eye View," at the California Raptor Center. (Photo by Kathy Keatley Garvey)
Article

Of Raptors and Insects

February 4th, 2025
When you visit the California Raptor Center (part of the UC Davis School of Veterinary Medicine), during the 14th annual UC Davis Biodiversity Museum Day on Saturday, Feb. 8, be sure to see "A Bird's Eye View," a ceramic-mosaic mural that graces an outer wall of the visitor center.
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The Master Gardener program is a volunteer organization associated with the University of California Cooperative Extension.  Our mission is to extend research based knowledge on home horticulture, pest management, and sustainable landscape practices to the residents of California and to be guided by our core values and strategic initiatives.

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  • Are trained, non-paid teaching staff certified to extend practical horticultural information to Napa County residents.
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  • Stay up-to-date on current UC research based gardening information through continuing education provided by UC Cooperative Extension.  
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Napa
707-253-4143
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Upcoming Events

Apr 6 2025

April Fuller Park Tree Walk

Historic Fuller Park is an arboretum of many exotic and native trees that have been planted over the last 120 years. Please join a UC Master Gardener on a 1 1/2 hour guided walk through the park to…
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