Bermuda Buttercup

In the fall-winter in southern California, clusters of bright green clover-like leaves followed by long stems topped with clusters of inch wide, bright yellow flowers from late winter-spring. It has become an invasive plant along the coast of California. Underground corms must be completely removed to eliminate this prolific plant, even if a small bit of the corm is left behind, it will return again. Plus once the flowers are spent, multitudes of seeds are dispersed. To prevent this, carefully hand remove the weed making sure you have the entire corm/bulblet and then sprinkle the area with a pre-emergent formulated for Oxalis to prevent any seeds from germinating, but do not apply the pre-emergent in an area where you are planting cultivated seeds.