Will Def Fluid Kill Grass?

Understanding DEF Fluid and Its Compositions

DEF Fluid is a critical component in diesel engines with selective catalytic reduction, designed to reduce the emissions. To understand DEF Fluid and Its Compositions, refer to the following table:

Composition Percentage
Urea 32.5%
Deionized Water 67.5%

It is crucial to note that DEF fluid does not contain any harmful substances and poses no threat to grass or vegetation around it.

However, it is essential to handle DEF fluid with care, as Urea can release ammonia under certain conditions, which can harm grass and other plants. Ensure that spills are cleaned immediately, and storage containers are kept away from lawns or vegetation.

To avoid damage to lawns and gardens, it is necessary to store DEF fluid in its original container in a well-ventilated area away from combustibles, direct sunlight, heat sources and humidity.

Looks like the only green grass you’ll have with DEF fluid is in the form of dollar bills for lawn repairs.

Can DEF Fluid Create Damage to Grass?

To help you understand the possible impact of DEF fluid on your lawn, we’ll dive into the question ‘Can DEF Fluid create damage to grass?’ In this section, we’ll explore why DEF fluid could hamper the growth of grass and how it is different from ordinary fertilizers. Let’s take a closer look at each of these sub-sections for a clearer picture.

Why DEF Fluid could Hamper the Growth of Grass?

DEF Fluid has the ability to damage grass. This fluid is a solution of urea and deionized water that is used in diesel-powered vehicles equipped with Selective Catalytic Reduction (SCR) systems. They are mainly added to reduce harmful emissions by converting nitrogen oxides into harmless nitrogen and water vapor.

However, if DEF fluid comes into direct contact with grass, it can cause burning and discoloration due to the high concentration of nitrogen.

The damage caused varies based on several factors such as the age of the grass, moisture levels, temperature, and duration of contact. The younger the grass, the more likely it is to suffer from damage due to its sensitive nature. Moisture levels also determine how quickly the fluid will absorb into the soil and reach the roots causing irreversible nutrient depletion in most cases.

If you have recently used DEF fluid in your vehicle, avoid parking or driving over grass areas for an extended period. Continued contact can cause long-term harm to your lawn resulting in loss of nutrients and eventual death of your turf.

It is essential to clean any spills or leaks immediately by diluting them with vast amounts of water and avoiding their entry into any drainage system which could pose serious environmental risks.

Be conscious while using DEF fluids around your residence or during travel on highways near vast pastures or landscapes as they could potentially cause irreparable damage down the line if not handled with care.

Why settle for ordinary fertilizers when DEF fluid can give your lawn that extra kick, and potentially destroy your neighbor’s yard too?

How DEF Fluid is Different from Ordinary Fertilizers?

DEF Fluid and ordinary fertilizers differ in several aspects. DEF is not a fertilizer but rather a 32.5% urea-based solution that is used to reduce nitrous oxide emissions from diesel engines. In contrast, chemical fertilizers contain various macronutrients like nitrogen, phosphorus, and potassium to promote plant growth.

Here is a table that outlines the differences between DEF Fluid and ordinary fertilizers:

Properties DEF Fluid Ordinary Fertilizers
Primary Use Reduces diesel emissions Promotes plant growth
Chemical Composition Urea, deionized water, additives Macronutrients, often containing NPK (nitrogen, phosphorus, potassium)
Microorganisms Cannot support bacterial life Supports microbial activity
pH Value Neutral Acidic

Additionally, while ordinary fertilizers are nutrient-rich and aid in plant growth, DEF Fluid does not contribute to any growth but instead can cause grass damage due to its high nitrogen content.


  1. Regularly check vehicles for possible leaks to avoid accidental spills.
  2. Promptly clean up any spills or drips of DEF fluid with water before it gets absorbed into the soil.
  3. If spillage happens on the lawn or field area with grass coverage operate sprinklers evenly covering all areas immediately after hosing down.

By following these guidelines you can maintain the longevity of your grass while continuing to use efficient equipment with minimal environmental impact by using DEF fluid as needed. DEF Fluid may not be harmful to your grass, but a urine-loving dog certainly is. Here’s how to keep both at bay.

Measures to protect your Lawn from DEF Fluid

To protect your lawn from DEF Fluid, which can harm the grass, you need to take measures. In this section on ‘Measures to protect your Lawn from DEF Fluid’, we present safe and eco-friendly alternatives to DEF Fluid as well as how to clean lawn if DEF Fluid spills on it.

Safe and eco-friendly alternatives to DEF Fluid

A safer and greener substitute for DEF Fluid:

  • Biodegradable urea
  • Selective catalytic reduction using AdBlue
  • Conversion of nitrogen oxides to nitrogen and oxygen through exhaust gas recirculation may eliminate the need for SCR altogether
  • Taking care of your engine with regular maintenance reduces the need for DEF in the first place
  • Properly disposing of used DEF fluid can also reduce environmental impact.

While DEF Fluid is widely used, it is not sustainable for the environment or human health. Using a substitute option such as biodegradable urea or AdBlue while maintaining your engine can help reduce the reliance on DEF Fluid and lower your impact on the planet.

Consider switching to a greener alternative today to ensure a healthier future.

Looks like there’s a new addition to the list of things that can ruin my lawn party – DEF fluid spills.

How to Clean Lawn if DEF Fluid spills on it?

To maintain your lawn’s health, cleaning the DEF fluid spill immediately is crucial. Here is a simple 3-step guide to help you clean the spill without harming the turf.

  1. Wear gloves and safety glasses before proceeding with the cleanup process.
  2. Cover the area with sawdust or cat litter as it helps absorb any leftover fluid.
  3. Use a soapy solution with water and a soft scrub to remove any residue remaining on the lawn. Rinse thoroughly using water.

Upon completing these steps, discard the materials used for cleanup appropriately. Be cautious not to harm your lawn or local environment by disposing of chemicals irresponsibly.

Pro Tip: In case of a significant spill, contact professional assistance immediately to ensure proper management and prevent potential hazards.

Related Posts

Andrew Fisher

Andrew Fisher

Andrew is a dedicated father of three who really takes pride in his lawn and garden. You'll find Andrew behind the scenes of almost everything Edge Your Lawn produces. When he's not helping readers find all the information they need, he's in his backyard working on his lawn and garden landscaping. This year he hopes to build an outdoor deck and sort out his veg patches.

Popular Articles

Restring A Weed Eater
Beginner's Guides

How To Restring A Weed Eater

Many people use a bump feed weed eater which is super convenient as all you need to do is bop the head of your string ...
Read More →

Recent Posts