I used the recommended rate and it knocked out the crabgrass very quickly. With days the crabgrass was dead. The day after application the dandelions were toast. Clover started to brown after about a week.
This stuff is the bomb for killing torpedo grass. Results are clearly seen after one application! Expensive but highly recommended for torpedo grass in a zoysia lawn. Suggest spraying on week 1, week 3, week 5 at a minimum to ensure torpedo grass death.