Effective, fast-acting, long-lasting. Kills weeds and grass within hours and prevents new growth for nearly a year. Concentrated.
Somewhat pricey, and it doesn't go as far as others on our list - but it is more effective. Not available for purchase in CA due to herbicide regulations.
Works fast. Good for hard-to-reach weeds/grass in cracks/crevices. Can be used safely around flowers, shrubs, and other vegetation.
Doesn't last as long as concentrated formulas. Does not kill existing weeds.
Effectively kills most weeds and unwanted grass. Highly concentrated for superior savings; 1 gallon makes up to 85 gallons of mix. Some users claim one jug lasts for up to 2 years.
Doesn't work overnight; takes several days to a week to kill weeds. Doesn't prevent new weeds. May not kill some robust weeds.
Kills broadleaf weeds such as dandelions, chickweed, and poison ivy without harming grass. Works within days. Concentrated; 2 - 3 tablespoons treats up to 1,000 sq. ft.
Not recommended for use on windy days, as it can drift and damage delicate plants. Chemical odor is strong and may linger for a few days.
A powerful weed killer that tackles hard-to-kill growth. Also effective at killing vines, brush, and some stumps.
Results aren't instant; resistant weeds take a few days to several weeks. Care must be taken to keep it from drifting to unintended plants. Some owners say their dogs tried to lick treated areas. Not concentrated.