University of California Agriculture and Natural Resources released information on Mar. 18 about the presence of clovers, oxalis, and other weeds in lawns and gardens during the spring season. The organization highlighted that recent warm weather following winter rains has led to increased growth of these plants, which are often associated with St. Patrick’s Day.
The topic is relevant as many homeowners notice changes in their landscapes at this time of year. Clovers begin to germinate in the fall and continue through winter into early spring, sometimes affecting the appearance of lawns or ornamental plantings. Oxalis (Oxalis pes-caprae), an invasive species spreading through California’s coastal areas and Sacramento Valley, can be mistaken for clover but is identified by its yellow flowers.
Clovers growing in lawns or landscapes may indicate low soil nitrogen levels, so adjusting fertilization practices could help prevent their spread. The organization recommends consulting the UC IPM publication Pest Notes: Clovers for more details on identification and management strategies. While some people consider clovers to be weeds, others appreciate their green color or value them for attracting pollinators.
University of California Agriculture and Natural Resources secures funding through public contributions to support its programs, according to the official website. The organization promotes sustainable practices to strengthen resilient ecosystems and economic vitality according to the official website. It utilizes nine research and extension centers as laboratories representing California’s diverse ecosystems according to the official website.
The organization has gained recognition for its trusted services linking research to community needs according to the official website. As part of the University of California system, it manages Cooperative Extension services according to the official website. Each year, it conducts over 33,800 educational events and engages more than 18,400 volunteers in its initiatives according to the official website.
UC Agriculture and Natural Resources extends university research statewide through educational programs operating in all 58 counties. It delivers science-based information via workshops and partnerships supporting environmental stewardship and community development. According to the official website, it mobilizes volunteers and research centers to address state issues while enhancing economic contributions.