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May 2025Archived
Field picture submitted by Elizabeth Fichtner

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hand pruning a branch with pruners
UC Marin Master Gardeners: Event

Pruning California Native Trees and Shrubs

May 27, 2026

Program: Introduction to Pruning California Native Trees & Shrubs from an Aesthetic & Conservation/Ecology Perspective: the slide show lecture covers basic pruning, structuring woody plants, recognizing forms of specific species and how their habit informs the way we prune, pruning timing, and…
UC Marin Master Gardeners
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Master Gardeners Helping at Booths
UC Master Gardeners of San Diego County: Event

Ask-A-Master Gardener 11a-5p at the San Diego County Fair

Jun 10, 2026 - Jul 5, 2026

11am - 5pm.  Come visit our informational booth and chat with a UC Master Gardener about any growing questions you may have. We will be there to help extend research-based knowledge and information on home horticulture, pest management, and sustainable landscape practices to the residents of San Diego…
UC Master Gardeners of San Diego County
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: How to Prepare Jars for Canning

May 7, 2026
Preparing canning jars is an important step in the process. One of the very first steps in the canning process is preparing your equipment, including canning jars. Here’s how to go about prepping your jars for canning.Inspect.  Whether used or fresh out of a new box, inspect jars to make sure…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Is Reusing Commercial Product Jars Wise?

May 7, 2026
Commercial product jars are not designed to be repurposed for home canning. Is it possible to reuse mayonnaise and other similar commercial product jars for home canning? Some people have done so with some success. But even though it’s technically possible, it’s really not advisable. Here’s why…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: When and How to Sterilize Canning Jars

May 7, 2026
It's not always necessary to sterilize jars before canning.When canning, sterilizing jars is essential only when processing times are less than 10 minutes. For processing times of 10 minutes or more, pre-sterilization is not required – the jars become sterilized during processing. Can you pre-sterilize…
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UC Master Food Preservers of Central Sierra: Article

Preserve it! Series: Jar Breakage is Shocking, but Avoidable

May 7, 2026
Canning Basics: Thermal shock and how to prevent it. There are many reasons that canning jars can break during the canning process.  One common cause for jar breakage is thermal shock, caused by a temperature differential between hot and cold. The break is characterized by a crack that runs around…
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