Weeds would make the lawn, vegetable garden or flower bed unaesthetic. Worse still, they would also steal nutrition from your plants and compete for sunshine, water, etc with them. Therefore, it is a good idea to kill weeds so as to make your plants grow happily and healthily. How would you choose to clear the weeds? Mowing or pulling stubborn weeds seems to kill them, but it will grow back later. The most effective method we recommend is to apply a weed killer which uses chemical substances to permanently remove weeds. However, as there are so many weed killer options of different brands and types, it could be a difficult job to choose the best weed killer. Therefore, we write down this best weed killer reviews in order to help you choose the wisest decision. 

#1 Ortho GroundClear Weed Killer 

Ortho weed killer is known to be the best weed killer for overall which could be applied to driveways, sidewalks, patios, gravel paths, fence lines and so on. Whenever you want to remove unnecessary vegetation or weeds, you just need to fill the weed killer into a sprinkling can or tank sprayer and apply to your target. It will take effect within hours. Once the weeds are killed, it will prevent new growth for at least one year.

There are three application methods listed as follows:

Concentrate

The concentrated application method of this weed killer is applicable for either large or small areas. Before using the weed killer, please mix it with water under instruction and use a sprinkling can or tank sprayer.

Sprinkler Cap

Sprinkle cap is a perfect design for cracks. When using it, you have to remove the top cap and you could adjust project flow by tilting the bottle to different angles.

Comfort Wand

Using weed killer with comfort wand covers an area of 400 square feet. It is ideal for accuracy and precise control.

#2 Compare-N-Save Concentrate Grass and Weed Killer

This is another best weed killer recommended by Amazon which claims to remove unwanted weeds from whenever you like, including driveways, sidewalks, along with the fence, around flower beds, shrubs, vegetable gardens and so on.

This weed killer could make up to 85 gallons of ready-to-use spray solution, covering an area of 25,000 square feet. Before using it, you have to carefully mix it with water under instruction.

In order to receive the best results, manufacturers suggest to apply it in warm and sunny days with the temperature higher than 60°F. You’d better check the weather forecast to make sure that it won’t rain in the coming 24 hours before using.

This weed killer consists of 41% so that it will kill the weeds to the root in 2-4 days. Glyphosate which won’t prevent new growth for a long time. You could work on the areas that you have applied this weed killer after one day. It is perfect for replanting vegetables or flowers.

 #3 Southern Ag 2, 4 - D Amine Weed Killer 

This is recognized as the best weed killer for lawns, gardens or anywhere else of economical use. You just need 1-4 pints of Southern Ag weed killer per acre.

It is able to kill many kinds of broad-leaved weeds, woody plants. As it does not work against grass, you could feel free to apply it to the lawns, farms, fences and so on. However, you have to be patient because some stated that you have to wait until two weeks later. 

Tips for Choosing & Using Weed Killer

Unlike mowing lawns to keep it tidy and beautiful, weed killer mainly applies chemical substances to remove weed from the root. Therefore, you have to carefully use it in case that it will do harm to you or your grass.

• Do check the weather report beforehand

Rain or irrigation will wash the weed killer. So please make sure that it won’t rain in the next 24 hours.

•  Do not use it in extremely hot weather

The high temperature could make the weed killer out of work. There is no exception even for the best weed killer.

•  Do not apply weed killer to young grass

The young grass is universally acknowledged to have no resistance to a powerful chemical weed killer. They could be burned or even died, but you could apply it to young weeds.

•  Do not mow the lawn for 2-3 days before or after the spray

It adds difficulty for short weeds to fully absorb weed killer.