The UC Master Gardeners of San Diego County released guidance on April 28 for residents interested in selecting, planting, and caring for trees. The information emphasizes the importance of choosing healthy trees from nurseries and following best practices for planting and maintenance.
Proper tree care is important because trees contribute to cleaner air, energy savings, climate change mitigation, increased property value, wildlife habitat, and improved soil and water quality. The guidance notes that mistakes such as topping or poor pruning can harm trees by making them more susceptible to disease. It also warns against allowing grass or weeds to compete with young trees for moisture and nutrients.
The organization advises buyers to inspect nursery stock carefully for root health and sturdy structure before purchase. When planting a tree, gardeners are encouraged to dig a broad hole with roughened sides, ensure the root crown sits above the soil line, avoid staking unless necessary, use mulch properly around the base while keeping it away from the trunk, and water deeply after planting.
In addition to these tips, residents are reminded not to top their trees or use poor pruning techniques. Regular inspection for insect damage is recommended; if disease is suspected, consulting a certified arborist is advised. Tree selection should consider function—such as shade or fruit production—as well as characteristics like growth rate and pest resistance.
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University of California Agriculture and Natural Resources has gained recognition for its trusted services linking research with community needs according to the official website. As part of the University of California system managing Cooperative Extension services according to the official website, it conducts over 33,000 educational events each year with more than 18,000 volunteers involved in its initiatives according to the official website.