Best weedkiller for purple oxalis on soil containing plants, lawn and patio?

Question

This weed is taking over. Is boiling water, salt any good?

Answer 1

Boiling water should kill it but may not get all of the rhizomes, only the top growth. When using a selective herbicide, which won't harm the lawn, take care to avoid any ornamentals. This article explains your options:
https://www.gardeningknowhow.com/plant-problems/weeds/managing-oxalis-weeds-in-lawn.htm