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Will Water Softener Salt Kill Grass? All Concerns Explained

We all want a beautiful green lawn in our house. But when you see that, the grasses are becoming yellow, you must feel very down. So, where is the problem? Is it because you water your garden using soft water?

The question arises, will water softener salt kill grass?

Yes, water softener salt kills grass. It contains a large amount of sodium that dehydrates the soil! So, the grass has become yellowish. Slowly you’ll see that it won’t survive in the soil. But, there are ways to fix it.

Let’s go through the truth of why water softeners kill grass? In case you’re planning to use it on your lawn, we’ve discussed everything related to it.

Time to dive in!

Should You Use Water Softener Salt on Grass? 

No, you should not use water softener salt on grass. 

The bad news is, using soft water has a long-term effect on the soil. The salt stays for at least one year because it evaporates slowly.

Soft water contains 12.5 milligrams of sodium per 8 ounces. So, using 1.3-2.1 gallons of water softener salt on a daily basis will dehydrate the soil. Grasses can handle up to 2300 milligrams of salt per 35 ounces approximately.

Thus you’ll end up with brownish grass on your lawn. Not the prettiest sight, is it? 

4 Alternatives Instead of Using Water Softener Salt In Your Lawn

Thinking about the alternatives to protect your lawn?  Don’t worry! We have collected 4 easy solutions for you!

Make sure to use these options before watering your lawn with soft water.

Use Hard Water Instead!  

The easiest way for watering your grasses is with hard water. It has several advantages for the betterment of your lawn. 

It adds more calcium and magnesium to the soil. So, now the question comes, how much hard water should you use on the lawn?   

Well, use 3 gallons of water, about 3 days a week.

Now, it’s very easy to collect hard water. If you have a water softener filter, use the filter’s bypass valve to access the hard water.

Be careful about the valve, sometimes the water shuts off while the valve keeps turning.    

You can also have a separate line to the outside tap installed by a professional plumber.   

But remember, do not overwater the grass. Too much water will make the grass colour yellowish with black spots.

That’s it! Use the perfect amount of hard water with a hose as you always do!  

Use Rainwater

Grass loves rain. It has the perfect pH balance and proper nutrients to keep the grass healthy. As it is good for your plants, you can collect rainwater in barrels.  

Want the best barrel to store your rainwater? Look no further! Here are some suggestions for you:

Product 1
Product 2

Now that you have the barrel, collect rainwater for your grass! 

Water your grass for 20 minutes, 5 gallons three times a week. It covers 1.5 inches per square foot which are enough for grass. 

Use Salt-Free Water Softener 

You can use a salt-free water softener for watering your grass. It contains the perfect amount of minerals which is ideal for grass.

You’ve to water 5 gallons, about 3 days per week. 

If you are looking for a salt-free water softener, we have some suggestions for you

Product 1 
Product 2 

Now you have your device at hand, use it to revive your lawn! 

Sprinkle Chlorine-Free Water

If you’re using tap water for your grass, you must ensure that it’s chlorine-free. 

Chlorine is poisonous to grass. However, a little amount of chlorine will not kill the grass. You can use a pH indicator to check if the water contains chlorine or not. Chlorine levels should not get higher than 0.1 parts per million. 

If the levels are high, remember chlorine evaporates naturally. Just keep the tap water in a watering can and wait for 2 days to dechlorinate it.  Then water your lawn as usual.

Using Soft Water For A Longtime? 2 Easy Steps To Fix It!   

Using soft water for a long time affects the grass. Even though water softener discharge can be considered useful. But that’s not the case most of the time. It can cause your lawn to turn yellow.

Now, you must be wondering if it is fixable or not! The good news is, you can fix it easily. 

Don’t worry at all! We have given 2 easy processes to save your lawn! 

Stop Using Soft Water! 

Soft water will turn your grass yellowish. It will hardly grow because of the dehydration of soil. So, stop using soft water immediately. 

Use rainwater instead!

You know, rainwater absorbs into the soil, it adds minerals to the water. It eventually becomes hard water.

Rainwater will enable your grass to grow healthy. As we said earlier, it’ll help evaporate the soft water and wash off the excess amount of salt.

Try Leaching (A Drainage System)

The process of leaching is applied in areas where the water has a high salt content. Now the question is, how much space is needed for this system on the lawn?

It may take up to 100-feet long. 1-3 feet in width, separated by six feet or more. The slope should be downward with a minimum of 1/4 inch per foot. 

Now, how does it work?

Leaching is one of the key processes to drain out the excess salt in the soil. In this process, you have to over-water your lawn with natural water. The excess water will wash off the salt and will go to the drain. 

Sometimes when the water softener discharges outdoors, leaching can help as well.

Let me give you an interesting fact, even stadiums are leach fields. That’s why grasses look very green and healthy.    

You must ensure that there is enough drainage system to get rid of excess water. Otherwise, the grass will become waterlogged.

You must check every day until you get proper results. Finally, your lawn will look lush like those stadiums.   


Question: Are stadiums leach fields?
Answer: Stadiums are leach fields. And that’s why, after any storms, excess water dries out so quickly! This is also the main reason, grasses look green and healthy in it.    

Question: Can hard water kill plants?
Answer: Yes, overwatering with hard water can kill plants. Hard water contains a high amount of minerals which is good for your plants. But remember, excess of anything is bad. So, overwatering your plants will cause damage and it will kill your plants.

Question: Where is the hardest water in the world?
Answer: Greater than 1,000 ppm hard waters are in Texas, New Mexico, Kansas, Arizona, Utah, parts of Colorado, Southern Nevada, and Southern California.

Parting Words

That’s it! By now, you should know – will water softener salt kill grass? 

Do not use soft water in the soil. Go for any of our alternatives. However, if you already used it,  protect your grass now!

Happy gardening!