Introduced to the United States as an ornamental plant, Pink woodsorrel (Oxalis debilis) was documented in Florida as early as 1930. While considered invasive in parts of the Pacific and Asia and noted to be spreading quickly in the US, it has not been designated as invasive in Florida. There are eight species of Oxalis documented in Florida although only two are native.
Habit: Perennial herb, 6-12 inches in height.
Leaves: Compound with 3 heart-shaped leaves per stem.
Flowers: 2-12 flowers are clustered in an umbellate cyme. Individual flowers are pink to lavender with 5 veined petals and yellow stamen.
Reproduction: Small ovoid bulbs and rhizomes.
Distribution in Florida: Statewide
Some consider it to be problematic in home landscapes and food gardens as it can form dense colonies via rhizomes. It is also very adaptable to many growing conditions and habitats.
Check any incoming plant material for stowaways.
Hand pull ensuring all bulbs and rhizomes are removed.
Mowing is ineffective and rototilling can actually stimulate growth and spread rhizomes.
Recommendations for a different Oxalis species can be found here. Consult your local IFAS Extension office for site specific recommendations.
USDA Plant Database