Creeping oxalis

Habit:

Least Yellow Sorrel is a low-growing herbaceous plant with a creeping or trailing habit. It often forms dense mats on the ground.

Stems:

The stems are delicate, slender, and usually green. They may root at the nodes when in contact with the soil, aiding in vegetative propagation.

Leaves:

The leaves are trifoliate, meaning they consist of three leaflets. Each leaflet is heart-shaped, ranging in size from about 1/2 to 1 inch wide.

The leaves have a distinct sour or tangy taste when chewed, a characteristic common to many Oxalis species.

Flowers:

The small, yellow flowers have five petals and are borne on slender stalks.

Flowering typically occurs in spring or early summer, and the plant may produce flowers intermittently throughout the growing season.

Fruit:

The fruit is a capsule that contains tiny seeds. The capsules split open when mature, releasing the seeds.

Identification Tips:

Leaf Coloration:

The leaves are typically green, providing a nice contrast with the small yellow flowers.

Leaf Closure:

The trifoliate leaves may fold or close in response to low light conditions or at night.

Management and Control:

Cultural Practices:

Hand pulling or weeding can be effective, especially in small infestations. Ensure that the entire root system is removed to prevent regrowth.

Mulching can help suppress weed growth and make it easier to control.

Chemical Control:

Selective herbicides designed for broadleaf weeds can be used, but caution is needed to avoid harming desirable plants.

Pre-emergent herbicides may be applied to prevent seed germination.

Cultural Modification:

Promote healthy turf or ground cover in areas where the weed is problematic. A well-established and vigorous lawn can outcompete and suppress weed growth.

Regular Monitoring:

Regularly inspect the area for signs of regrowth or new seedlings. Early detection and prompt action can prevent the weed from spreading.

Non-Chemical Alternatives:

Consider using non-chemical alternatives such as hand weeding, mulching, or even introducing natural predators like insects that feed on Oxalis species.

Integrated Pest Management (IPM):

Adopting an integrated approach that combines various control methods can be the most effective strategy. This may include cultural practices, mechanical control, and, if necessary, targeted chemical control.