Identify Uncontrollable Weeds
Oxalis is a perennial plant that has pale green leaves divided into three heart-shaped leaflets resembling clover. This is an extremely difficult weed to control. In most cases, the weed does not respond to normal herbicide treatments. As the temperatures rise in late spring and early summer, the weed will thin or die off completely. As the temperatures begin to cool in the fall, the weed can become active once more.
Dichondra is a perennial weed with stems small and creeping. The leaves alternate forming mats not over two inches high. They produce flowers, but are best known for their small, evergreen, lily pad-shaped leaves. It usually thrives in damp, shaded areas. The weed is difficult to control using a herbicide without doing damage to the lawn.