How do you kill off rhubarb?

Chemical Treatment:

1. Glyphosate Herbicide: Mix glyphosate herbicide (such as Roundup) according to the package instructions and apply it directly to the rhubarb plant's leaves. Ensure that the herbicide is applied thoroughly, covering all parts of the plant. Repeat the application if necessary after 7 to 10 days.

2. Vinegar and Salt: Mix equal parts white vinegar and table salt, creating a concentrated solution. Apply the solution directly to the rhubarb leaves, ensuring thorough coverage. This method is less effective than glyphosate but may be an alternative if herbicides are undesirable.

Manual Removal:

1. Digging: Using a shovel or spade, carefully dig around the base of the rhubarb plant to loosen the soil. Once the plant is loosened, lift it out of the ground, ensuring that all roots are removed.

2. Pruning: Cut back the rhubarb plant to the ground using pruning shears or loppers. Be sure to remove all visible stems and leaves. This method may be effective in controlling the spread of rhubarb, but regrowth is possible from the roots.

Solarization:

1. Cover: Cover the rhubarb patch with a thick layer of black plastic sheeting. Weigh down the edges with rocks or bricks to ensure the sheeting remains in place. This method traps heat under the plastic, effectively cooking the rhubarb roots and killing the plant.

It's important to dispose of rhubarb plant material and roots responsibly to prevent their spread.