How to Dispose of Unused Lawn Fertilizer- Safe & Effective Methods

Lawn Fertilizer depends on how hazardous the fertilizer is. If you love showing off your healthy green lawn garden you are chance to use fertilizers regularly. If none exists in your area, contact local garden supply stores to see if they will accept your unused fertilizer for proper disposal ways.

There are several different kinds of fertilizers now available on the super or local market. Traditional chemical fertilizers contain nitrogen, phosphorus, and potassium compounds. Organic fertilizers contain plant matter, animal waste, or minerals that make nutrients more readily available in the soil and biosolids.

If you don’t know How to dispose of unused lawn fertilizer so here is the right place you are visiting. Which are treated sewage and sludge?

How To Dispose of Unused Lawn Fertilizer- Step by step

Certified organic fertilizers are usually safe for use on lawn gardens and pose little environmental pollution risk. Chemical and biosolid fertilizers are considered hazardous waste and should never be tossed in the trash. Down the drain, because they can contaminate local water supplies.


The main ingredient in synthetic fertilizers encourages the growth of algae. Which sucks the oxygen out of lakes, rivers, and streams, killing fish and other creatures that live their garden. Fertilizers cannot be recycled but you can follow these simple tips for proper disposal:

Look for neighbors or others that might be able to use your leftover fertilizer. This fertilizer eliminates the need for disposal.

Keep fertilizer stored in a cool or dry place out of the reach of children and pets until a household hazardous waste facility is located. Keep fertilizer, its original container or bag and never mix two types of fertilizer as this could result in a dangerous chemical reaction also.

When dealing with liquid fertilizer it’s helpful to place the container in a plastic bag to prevent the product from leaking on the ground.

When in Doubt Then Always Follow The Directions On The Package

Technically it can be used if you want but if you prefer to dispose of it, you should contact your solid waste company to find out when they collect household chemical waste products. You may ask your gardening friends if they would be interested in using it before you dispose of gardening.

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Chemical & biosolid fertilizers are considered hazardous waste and should never be tossed in the trash, down the drain because they can contaminate local water supplies. If none exists in your area. Contact local garden supply stores to see if they will accept your unused fertilizer for proper disposal ways.

Considered hazardous waste. Fertilizers contain high quantities of chemicals including nitrogen, phosphorous, and used sometimes pesticides or herbicides as well. If you can’t use them up for some reason and have no one to give them to. Proper disposal is the only remaining option. It isn’t as simple as just mixing it in with your other trash.

Contact Helpline

Call your waste management and garbage removal company. Inquire about hazardous waste drop-off locations and pick-up services. If none are available. Call your county or local university extension office to inquire if any known hazardous waste disposal programs are in your main location.

Packing Hazardous

Dispose of fertilizer in the trash. If no hazardous waste services are available also. Place granular fertilizer in a heavy-duty trash bag then double bag. It is a second trash bag and ties closed as soon as possible.

Leave liquid fertilizer in its container with the lid on. Wrap it in four and more layers of newspaper so it is absorbed in the case of a spill. Place the wrapped container inside a sturdy trash bag & tie closed.

Place the bagged fertilizer inside your trash can with your regular trash on the day of garbage pick-up. If taking your trash to a dump and notify the staff there is fertilizer in your trash.

Using Fertilizer

Using up fertilizer is always the best disposal method in lawn fertilizer. Dilute liquid fertilizer with one part water for use on houseplants. If you have no outdoor area to use it. Some granular fertilizers can be used on houseplants. Read label directions for application amounts also.

The National Environmental hotline can direct you to the nearest hazardous waste collection site in your main area.

Get Rid of Fertilizers Safely

If your garden shed and the shelf is cluttered with old dusty containers and torn bags. It’s time to do some house cleaning and garden style.

  1. The first step in cleaning out. The garden shed is to divides the contents into categories such as fertilizers, herbicides, insecticides, and more pesticides.
  2. Unlabeled and unidentifiable products should be removed for safe disposal. Once you have categorized your “leftovers” the decisions to dispose of and continue to use and store these products are simplified.

Fertilizers Category

The fertilizer category can be divided into dry & liquid, mineral, and organic types. Fertilizers usually come in a dry granular form composed of mined minerals and packaged in plastic bags to keep out moisture.
The mineral composition of fertilizers does not break down and will last indefinitely. Clumps in the bags of fertilizers mean that moisture has been absorbed. Simply break up the clumps of fertilizer before spreading it.

Liquid fertilizers may last years in an undiluted form. They may separate over time and require a good shaking to mix them.

Packaged organic fertilizers contain once-living components like blood and bone meal, raw & composted manure, or composted plant materials. Their shelf life depends on the chemical ingredients and may last from twelve months to five years.

Weed and Feed or All-in-One types of fertilizer products also contain synthetic and organic pesticides and manufacturers generally claim an effective shelf life of two to four years.

If you doubt the effectiveness of the product’s label or manufacturer for the “use by” date and recommendations for use it. Most product labels can be found online.

Store Fertilizer

Store all fertilizers in a cool dry place & avoid leaving them in direct sun. Large plastic buckets and boxes are the perfect “leftover” storage solution for big bags of fertilizers. Clip the bags shut and write the date of purchase on the bag with a large marker pen. If bags are old, torn, and fragile then dump the fertilizer contents into their own labeled plastic container.

Place liquid products in their original containers in tin cans, buckets, and boxes to prevent leakage or breakage.


Pesticides that control and kill weeds are called herbicides. Weeds are simply defined as a plant growing in the wrong place.

Weeds can be grass herbaceous or woody plants, and small or large plants. Pre-emergence herbicide products prevent the seed from germinating and post-emergence products to kill existing weeds.
There are specific or selective herbicides designed to combat weeds growing in a variety of garden locations. Lawns and groundcovers, flowers and vegetables and shrubs and trees.
Other herbicides are non-selective meaning that it will kill or harm any treated plant and they are generally used in non-garden areas of the yard. Herbicide products are packaged as granules, powders, and liquids.

Many come in a ready-mix sprayer or in a variety of concentrations that are mixed with water and sprayed bottle on plants.

Different Style

Most products have a shelf lifestyle of four years when stored properly out of the heat and direct sunlight in their original container. Do not mix any herbicide than you think you will use in one application & never pour herbicides down any indoor or outdoor drains.

Determine which herbicides to keep and which to properly throw away. Place broken bags in plastic containers and boldly label this herbicide container.

Fungicides, Insecticides, Rodenticides, and Snail Baits. All pesticide products need to be handled carefully because they are poisons that can harm humans, animals, and wildlife. They should be stored in sealed containers away from direct sun and heat used within two years.

Some pesticides that are designed to be mixed with water will break down or become ineffective. If stored improperly for too long. You will know your pesticide is ineffective if the pesticide solution separates if dry powders are lumpy and do not mix with water. If an emulsifiable concentrate does not produce a milky solution.

Dry or granular pesticide products are designed to be sprinkled into the soil. They should be securely stored away from pets and out of reach of children.

Pesticide And Hazardous Waste Disposal

Do not dump How left-over or unused gardening products into the soil, drains, or garbage. Improper disposal of unwanted products is a serious threat to the environment.


Different cities have waste collection sites. A visit to a household hazardous waste disposal site is the perfect solution to the problem of safely discarding leftovers and unwanted products from the garden shed.

We all need to help protect our environment. You should know How To Dispose of Unused Lawn Fertilizer. If you don’t want to do the lawn on your own or you need help for other reasons that we can handle all of the work for you.

We can help if you don’t have time to care for the lawn fertilizer, don’t want to buy a ton of expensive tools, or you can’t handle it on your own.