Ongoing research

green laminaria seedlings with small round leaves
UC Master Gardeners of San Mateo & San Francisco Counties: Article

Time to Start Vegetable Seeds

February 10, 2026
By Cathrin Callas
 Starting vegetable seeds indoors can reduce the cost of transplants and allow you to grow varieties that may be difficult to find in nurseries. To get started, you will need a soilless mix; growing containers; and the proper moisture, light (like a south-facing window) and temperatures between 65-75°F…
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Green grapes with white powdery blotches from powdery mildew
Over the Fence (Alameda County): Article

Managing Powdery Mildew

February 10, 2026
By Linda Carloni
Fungal diseases plague many different kinds of plants and their gardeners.  Fungal diseases tend to be persistent and can be difficult to manage.  Powdery mildew is one such disease.  It includes multiple fungal species and affects many different types of plants.  Powdery mildew…
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Green grapes with white powdery blotches from powdery mildew
Over the Fence (Alameda County): Article

Managing Powdery Mildew

February 10, 2026
By Linda Carloni
Fungal diseases plague many different kinds of plants and their gardeners.  Fungal diseases tend to be persistent and can be difficult to manage.  Powdery mildew is one such disease.  It includes multiple fungal species and affects many different types of plants.  Powdery mildew…
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UC Master Gardeners of Humboldt & Del Norte Counties: Page

Events and Classes

The UC Master Gardeners of Humboldt and Del Norte Counties offer free classes, workshops, and events throughout the year. Our programs are designed for home gardeners of all experience levels. Whether you're just starting your first vegetable garden or you've been gardening in our communities for decades,…
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The Demo Garden at Patrick Ranch has an All-Star Garden devoted to plants that do especially well in our climate. Laura Kling

Choosing the Right Plant for the Space

February 10, 2026
Have you ever felt overwhelmed by the selection of plants at the nursery? Or bought a plant that looked great at the nursery, but did poorly (or died) in your yard? Spring is here and it’s tempting to rush out and buy new plants for the garden.  But don’t be too hasty!  Choosing the right plant for a…
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Mixed Tomatoes
UC Master Gardeners • Napa County: Event

All About Growing Tomatoes

Apr 12, 2026

Join Napa Master Gardeners and learn everything you need to know about growing tomatoes. We'll discuss types of tomato plants and how to care for them, including soil and watering needs, staking, pest prevention and more. This workshop will be held by zoom.
UC Master Gardeners • Napa County
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Compost Pile
UC Master Gardeners • Napa County: Event

Worm -or- Backyard Composting Workshop (Multiple Dates Available)

Apr 25, 2026 - Oct 17, 2026

Free Backyard Composting 2026 Workshops Join Master Gardeners to learn about worm or backyard composting - choose your own adventure!  For those taking the backyard composting portion, after concluding the workshop you may purchase a discounted compost bin for $20.00 (One bin per household).  Worm…
UC Master Gardeners • Napa County
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Grape Vines
UC Master Gardeners • Napa County: Event

How to Plan Planting a Vineyard

Mar 28, 2026

Thinking about planting a small vineyard? Attend our workshop and learn about what is needed.Start by evaluating your site for sunlight, soil drainage, and slope, then prepare the land by tilling and amending the soil based on a soil test. Next, plan the vineyard layout, including row direction and spacing,…
UC Master Gardeners • Napa County
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