A: From November through April, the bright yellow flowers of Bermuda buttercup, Oxalis pes-caprae — also known as buttercup oxalis, cape sorrel or sourgrass — cluster on the ends of slender leafless stalks. Another survival technique of Bermuda buttercup is that, after initial removal by hand, new plants will grow from broken stem segments left in the soil. Voles, which consider Bermuda buttercup a palatable food source, also can contribute to the spread of bulbs, so even if you are meticulous in your garden, you still may end up with oxalis. Because Bermuda buttercup spreads mostly … These perennial plants, which grow in U.S. Department of Agriculture plant hardiness zones 4 through 9, bear dark green, three-segment, toothed leaves and produce yellow flowers. Another yellow-flowered kind is the weedy, creeping oxalis (O. corniculata). It inhabits agricultural land and other disturbed areas and is a common weed in artichoke fields on the Central Coast and in irrigated landscapes. * And keeps new weeds from growing for up to 4 months. Indigenous to South Africa, Oxalis pes-caprae, the "Bermuda buttercup", is an invasive species and noxious weed in many other parts of the world, including the United States (particularly coastal California), Europe, Israel and Australia. Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to email this to a friend (Opens in new window), 49ers 23, Rams 20: Defensive takeaways, Deebo Samuel power Niners to critical road win. Above: When foraging for Bermuda buttercup flowers, try to remove the entire Oxalis pes-caprae plant, and gather as many leaves and keep the stems as long as possible. Although the top of the plant can be controlled by cultivating or cutting it off, this will not kill the bulb. Chantal Guillemin is a Contra Costa Master Gardener. Though they will last longer by cutting the stems shorter and removing the leaves, I love the look of the entire plant in a vase. It can be seen throughout the Bay Area in the compacted, poorly drained clay soils of yards, gardens, turf, landscaped areas, urban places, orchards, vineyards, fields and among agricultural crops. Unsuspecting gardeners may introduce soil harboring Bermuda buttercup plants from nursery-bought containers. These readily detach from the rhizome to replenish the soil seed bank. Soursobs are regularly confused with clover due to their very similar leaf appearance. Controlling buttercup weeds is important in livestock areas, where the plant is toxic, but also in the home garden unless you like a tumble of interloc… Buttercup weeds (Ranunculus repens) form a creeping mat of dense foliage that can quickly overtake the lawn or a garden bed. Buttercups spread through both roots and seeds. It’s annoying, to say the least. Bermuda buttercup bulbils are difficult to see and are not killed by the high temperatures in the compost pile. Some researchers investigating approaches for controlling Bermuda buttercup suggest covering it with stiff cardboard and applying a thick layer of … Extended Control W and G Killer Concentrate The dual-action formula of Roundup Concentrate The dual-action formula of Roundup Concentrate Extended Control Weed and Grass Killer Plus Weed Preventer II kills existing weeds down to the root, guaranteed! Prevention and Control Top of page Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control.