Napa Master Gardener Column

Welcome to the Napa County UC Master Gardeners Column.  Each week a Master Gardener post an article about a current topic in home gardening.  We hope you enjoy these articles and tell your friends about them.

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Photo of textured leaves of oakleaf hydrangea, showing serrated margins, and with small white blossoms just emerging

Planting a Hillside

August 14, 2026
By Melanie Marshall, UC Master Gardener of Napa County.  If you’re like me, you may look at your landscape every day and imagine how much better it would look without the weeds. The harder question, especially if your property is on a hillside, is what to plant in their place.   I decided to remove…
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New Master Gardeners at 2026 Tomato Sale

Become a Master Gardener Trainee

August 10, 2026
By Gail Pavlosky, UC Master Gardener of Napa County. I didn't dream of becoming an expert gardener. I simply wanted to grow fresh food for my family and know what to do when something in my garden wasn't thriving.My vision wasn't hundreds of acres or living completely off the grid. It was much simpler:…
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Two monarch larvae, black with black spines, on a green pipevine leaf, next to a femalle monarch pupae, in the author's garden

Seen Any Monarchs Lately?

August 2, 2026
By Penny Pawl, UC Master Gardener of Napa County.  Every morning when I venture into my garden for my daily walk-through, I hope I will see the golden wings of a monarch butterfly. Occasionally I am lucky, but at this time of year, they are not laying eggs on my milkweed. They are just passing…
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Cancerwort plant

Oh Great! Another Weed to Worry About

July 28, 2026
By Cindy Watter, UC Master Gardener of Napa County.  May and June are wonderful months for Napa Valley gardens. The flowers haven’t gone to seed; the weeds haven’t emerged; the tomato plants look promising.  I had an unusually full social calendar in June, so I decided I would be the…
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Ganorderma fungus on cherry tree

Dealing with Ganoderma Fungus

July 18, 2026
By Cindy Watter, UC Master Gardener of Napa CountyAll the signs were there for some time, but I was too distracted to pay attention. First, the cherry tree (never a robust bearer) began to put forth two cherries per season. Next, I started to notice a healthy crop of mushrooms after every rain at the base of…
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