Does Rock Salt Kill Plants?

Rock salt doesn't discriminate between weeds and other plants -- it kills them all, and they'll never come back. If you're interested in improving soil condition, don't apply any rock salt to the area. Salt serves to weaken the integrity of the soil, and may damage it permanently.

How much salt will kill a plant?

Just a few grains of rock salt are enough to kill most plants. Sprinkle the salt around the base of the plant and allow it to naturally break down in the soil's moisture. For small weeds, such as dandelions, you might only need three or four chunks.

Is rock salt good for plants?

Rock salt is the cheapest of the ice-melters, it does work very well, and it can cause lawn and plant damage. ... Excess sodium in the soil can damage the small feeder roots of many plants and harm their ability to take up water. That can lead to browning around the leaf margins during the growing season.