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Best Organic Lawn Fertilizer (2023 Review)

Updated Jan 10, 2023

Updated Jan 10, 2023

Home > Lawn > Best Organic Lawn Fertilizer (2023 Review)

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Organic lawn fertilizer is becoming more popular as people look to reduce their environmental impact and create safer homes for their families. Unfortunately, preconceived notions prevent some people from making the switch to using purely organic lawn food, which is a shame considering it can be just as effective as chemical fertilizers.

Some of the best lawn care companies have organic lawn care plans that use all-natural fertilizers instead of traditional chemical fertilizers, and they all succeed in helping customers grow a thick, green lawn. This article explores the seven best organic fertilizers available today to help you make the switch without comprising your lawn’s health or curb appeal.

What is Organic Fertilizer and Why Use it?

Organic fertilizer is a natural alternative to the chemical fertilizer that lawn care companies have been using for decades. Organic fertilizers replace the harsh chemicals featured in synthetic fertilizers with natural ingredients that are safer for humans and better for the environment. Many of the chemicals found in traditional fertilizers have been linked to cancer and come with frightening health warnings, making organic fertilizers a no-brainer for anyone concerned about exposing themselves or their family to unnecessary risks.

Many homeowners are turning to organic fertilizers to reduce their environmental impact. Chemically-based fertilizers with synthetic ingredients have been shown to contaminate groundwater, leading to a host of long-term health issues. As society becomes more focused on cultivating a healthy relationship with the environment, organic fertilizer is becoming more popular. Luckily, switching to organic fertilizer doesn’t mean settling for a less attractive lawn, as most organic fertilizers are just as capable as synthetic fertilizers at creating a healthy, vibrant lawn.

Pros and Cons of Organic Fertilizers

If you’re only concerned with reducing your environmental impact and eliminating hazardous chemicals from your yard, organic fertilizers are the way to go. However, organic fertilizers are different from traditional fertilizers, so you should weigh the pros and cons before making a decision.

Pros & Cons


  • Reduces your environmental impact
  • Safer for your family and pets
  • Works as well as traditional fertilizer
  • Tons of choices
  • Available from many professional lawn care services


  • More expensive than chemical fertilizer
  • Takes more expertise to use effectively
  • Many people find it has an unpleasant odor
  • Harder to find locally

7 Best Organic Fertilizers For Your Lawn

  1. Sunday Lawn Care: Best Organic Fertilizer
  2. Jobe’s Organics 09524 All-Purpose Fertilizer: Best General Fertilizer
  3. Scotts Natural Lawn Food: Best for Lawns
  4. FoxFarm Happy Frog Tomato & Vegetable Fertilizer: Best Fertilizer for Vegetables
  5. Jobe’s Organics All Purpose Fertilizer Spikes: Best Slow-Release Fertilizer
  6. Wiggle Worm Pure Worm Castings: Best Organic Soil Builder
  7. Neptune’s Harvest Organic Hydrolized Fish & Seaweed Fertilizer: Best Liquid Lawn Fertilizer

1. Sunday Lawn Care: Best Organic Fertilizer

Sunday Lawn Care is one of the visionary companies leading the way to a more environmentally friendly future by using 100% natural ingredients in all its products, including its proprietary fertilizers. The company uses organic ingredients like soybean protein, iron, molasses, and seaweed to craft customized fertilizer regimens for the customers. The company is barely four years old but has already replaced millions of pounds of fertilizer with safer organic options.

Best DIY Option
  • Plans customized to fit your exact lawn needs
  • All natural ingredients
  • Subscription service deliver right to your door, right when you need it

Sunday’s service includes a free soil analysis and a customized lawn care plan based on your location’s climate and weather patterns. The only downside is that the company is online-only, so you’ll have to apply the fertilizer they send you yourself.

To learn more: Sunday Review.

2. Jobe’s Organics 09524 All-Purpose Fertilizer: Best General Fertilizer

If Sunday’s comprehensive service isn’t what you’re looking for, Jobe’s Organics All-Purpose organic fertilizer is a great pre-bagged option. It comes in reasonably priced 1.5-pound, 4-pound, or 16-pound bags. Jobe’s All Purpose blend contains a 4-4-4 nitrogen-phosphorus-potassium (NPK) ratio, meaning it’s well-balanced and suitable for most lawns and will promote healthy grassroots thanks to its high potassium content. You can also use it to fertilize vegetable gardens, flower beds, and certain trees and shrubs, making it a great option for bulk purchases since it can be used anywhere you need fertilizer.

This fertilizer is 100% organic and is derived from feather meal, bone meal, poultry manure, and sulfate of potash.

3. Scotts Natural Lawn Food

Scotts is a big name in lawn care, so it’s not surprising that they make an organic lawn fertilizer. Scotts Natural is certified organic by the Organic Materials Review Institute (OMRI), and it is safe to walk on immediately. It’s also a pet and child-friendly formula, so you don’t have to worry about keeping the kids off the lawn after application.

Scotts Natural Lawn Food is good for both cool season and warm season grasses and has an 11-2-2 NPK breakdown. It’s competitively priced and comes in manageable bags designed to cover 4,000 square feet (sq. ft.).

4. FoxFarm Happy Frog Tomato & Vegetable Fertilizer: Best for Tomato Gardens

Organic fertilizer isn’t just for lawns. FoxFarm’s Happy Frog Tomato & Vegetable Fertilizer is specially-designed to optimize vegetable growth, making it the best organic fertilizer for home farmers. It features a fine-tuned 5-7-3 NPK ratio that creates the perfect soil environment that enables tomatoes, soft fruits, and berries to grow to their full potential.

One downside to FoxFarm’s products is their prices, which tend to be on the high side. However, they make high-quality organic lawn care products, and for specialized uses — like vegetable gardens — you only need a small amount. The vegetable & tomato blend comes in 4-pound bags.

5. Jobe’s Organics All Purpose Fertilizer Spikes: Best Slow-Release Organic Fertilizer

If you need a slow-release organic fertilizer, look no further than Jobe’s Fertilizer Spikes. They come in tons of different varieties designed for different kinds of plants, from potted plants and hanging baskets to trees and shrubs, and even palm and evergreen-specific options. All of Jobe’s Fertilizer Spikes release organic fertilizer slowly over a two-month timeframe, providing your plants with all the nutrients they need to thrive.

The hanging basket blend is extremely affordable and comes with 18 spikes in a resealable bag. It has an 8-9-12 NPK rating. Customer reviews rave about how easy Jobe’s Fertilizer Spikes are to use, and we think their slow-release design is perfect for potted plants and hanging baskets.

6. Wiggle Worm Pure Worm Castings: Best Organic Soil Builder

Your soil’s health is the most important factor that determines how well your plants and vegetables grow, and Wiggle Worm’s Soil Builder organic fertilizer is the best organic way to improve your garden’s soil quality. This organic fertilizer features pure earthworm castings, which are extremely effective at naturally enriching soil. You only need a small amount of this fertilizer to make a noticeable difference, making it one of the most cost-effective ways to give your vegetables and flowers a boost.

One of the best parts of Wiggle Worm’s Soil Builder is the absence of any strong odors, something that plagues most organic fertilizers. It might seem like an unimportant detail, but it makes a big difference if your garden is remotely close to any outdoor seating area.

7. Neptune’s Harvest Organic Hydrolized Fish & Seaweed Fertilizer: Best Liquid Organic Fertilizer

So far, all the organic fertilizers featured on this list have been granules. If you prefer to use liquid fertilizer — or if you don’t have a spreader — and want to stick with organic products, Neptune’s Harvest Organic Hydrolized Fish & Seaweed Fertilizer is by far your best option.

There aren’t many liquid organic fertilizers on the market, but Neptune’s take on an organic liquid fertilizer isn’t the best because it’s the only option but because it works. The 2-3-1 NPK ratio works well for most purposes but is especially good for vegetable gardens. It’s very easy to apply, as long as you have a sprayer.

The only downsides are the smell and the price. Organic fertilizer usually smells bad but this one takes unpleasant odors to the next level by adding fish emulsion to the mix. Seriously, don’t use this if you want to spend any time near your garden in the next three to four days. It’s also not the cheapest organic fertilizer, although we think it’s worth the extra price.

Final Thoughts

If you want the best organic lawn fertilizer money can buy, go with Sunday Lawn Care. The company is dedicated to using 100% natural ingredients in all its lawn care products and is extremely knowledgeable when it comes to using organic lawn care products. Sunday’s comprehensive lawn care plan includes personalized fertilizer treatments designed using a free soil analysis and information about your home’s local climate.

Sunday does an excellent job of making organic lawn care easy by sending you complete fertilizer packages by mail on a schedule designed to get the most out of your lawn. Each shipment comes with clear, concise instructions for applying the organic products in the box, making it easier than ever to grow healthy, green grass without relying on synthetic fertilizers and hazardous chemicals.

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Frequently Asked Questions

Is organic fertilizer better for your lawn?

In terms of your lawn’s quality, no, organic fertilizer is simply as good as ordinary fertilizer. However, for the overall health of your family and the peace of mind you get from avoiding introducing hazardous chemicals to your property, absolutely, organic fertilizer is better for your lawn. It won’t make your grass greener on its own, but some of the world’s finest golf courses use organic fertilizer to great effect and you would never be able to tell the difference.

What is the best organic lawn feed?

Sunday’s proprietary lawn care blends are the best organic lawn fertilizers on the market today. The company customizes its lawn care treatments by tuning the fertilizer blends to meet your lawn’s needs based on information they extract from a complimentary soil analysis. This means that you not only get high-quality organic lawn care products shipped to your door but you get products that are fine-tuned to your grass type and climate.

How can I fertilize my lawn without chemicals?

The easiest way to fertilize your lawn without chemicals is to sign up for Sunday Lawn Care’s organic fertilizer service. The company specializes in organic fertilizer and lawn care and sends its customers whatever products they need directly to their door.

If you prefer to do the legwork yourself, go with an all-purpose organic fertilizer like Jobe’s Organics All Purpose blend. Generic lawn blends work well in a wide range of cases but won’t optimize your lawn’s or garden’s growth the way a focused fertilizer regimen from Sunday will.

Will organic fertilizer burn grass?

No. One of the biggest advantages of using organic fertilizer is you don’t have to worry about nasty chemical burns on your lawn. Non-organic fertilizer burns grass when the concentration gets too high due to the mineral content, which can build up over time and dry out your lawn. If you don’t water your lawn properly or if you apply too much traditional fertilizer in a short amount of time your grass won’t be able to recover and will turn brown.

Is espoma organic?

Yes, Espoma offers a line of all-natural products that use 100% organic ingredients and are guaranteed to not include synthetic plant food. The company’s product lineup includes a 4-3-4 fertilizer, garden lime, garden gypsum, a 4-2-2 manure blend, a 0-0-0.1 potassium booster, and a soil acidifier that serves as an aluminum sulfate replacement.

How do I add organic matter to my lawn?

The easiest way to add organic matter to your lawn is by composting. A compost bin is easy to use and is the most environmentally friendly way to give your lawn a boost during the spring growing season. All you need to get started composting is a compost bin and a compost shredder. Then simply spread the composted material around your lawn to create fertile, nutrient-rich soil.

Another way to add organic matter to your lawn is to mulch when you mow. Grass clippings serve as a decent natural fertilizer and cutting your lawn higher is also a good way to protect it from stress during the summer.

Be careful not to overdo it, as adding too much organic matter can stifle your lawn’s growth and have the opposite of the intended effect. An unhealthy lawn is more susceptible to invading species like crabgrass and alfalfa, and it’s easier to prevent them from taking root than it is to eradicate them.

Is seaweed fertilizer good for lawns?

Absolutely! Seaweed is extremely nutrient-dense and it can help balance your soil and provide your lawn with the micronutrients it needs to grow. Many organic fertilizers use seaweed as one of the primary components for its NPK content, low environmental impact, and low cost. Seaweed also contains magnesium, zinc, calcium, and iron, all of which are beneficial for most types of grass.

When should I apply organic fertilizer to my lawn?

A professional lawn care service like Sunday Lawn Care will send you organic fertilizer when you need it so you don’t have to worry about devising a fertilization schedule. If you decide to make your own schedule, you need to know what type of grass you have since different types of grass require fertilizer at different times.

Cool season grasses like Kentucky Bluegrass, tall and fine fescue, ryegrass, and bentgrass need a small amount of organic fertilizer in early spring when soil temperatures stabilize around 55°F. They benefit from nitrogen fertilizer during the initial growth phase and towards the end of the season. Most cool season fertilizer programs up the applications starting in late summer and continuing through the fall until the grass goes dormant.

Warm season grasses like Zoysiagrass, Centipedegrass, Bermuda grass, and St. Augustinegrass get fertilized in late May or early June when they enter their peak growing season. Milorganite is a popular organic fertilizer for warm season grasses and most experts suggest one heavy late spring application followed by another in early September. The goal of fall applications is to prepare the lawn for its dormant season and ensure it has enough nutrients to survive the winter.

How do I treat my soil organically?

Taking time to make sure you have healthy soil is the best way to cultivate a healthy lawn and root system. The soil ecosystem is a complicated environment that requires care and attention to nurture. The key components of soil structure are soil microbes and microorganisms that consume and produce chemicals that your lawn needs to grow; think of them as the most natural lawn fertilizer.

These organisms produce and balance micronutrients and amino acids during their lives and contribute to your soil’s biosolid content by providing food and resources for other life forms. Improperly balanced soil will never support a lush lawn, so make sure you conduct a soil test at least once per year.

Look for organic fertilizers that contain ingredients like blood meal, bone meal, and seaweed or kelp, as these can make a big difference to nutrient-deficient soil.

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From our top recommended lawn care service, TruGreen

House Method Rating & Methodology

At House Method, transparency and trust are our most important values for the reader. That’s why we took the time to create an objective rating system and score each lawn company/service according to our methodology.

Our research team dug deep into the fine print of contracts, combed through more than one hundred customer reviews, and thoroughly investigated all of each lawn care service’s services, costs, and products. We’ve done the homework for you by researching nearly all of the lawn care companies on the market so you can have the information you need to make the best choice for your home.

We developed a formula to objectively determine the best lawn care companies and give each a score out of 100 based on the following criteria:

  • Plan Options (30): Do they provide a variety of plan options? We looked at the number of plans each company offered and the flexibility of adjusting the plan.
  • Services offered (20): How many services are offered in each plan? We looked at the number of lawn care coverages, including weed control, seeding, irrigation, aeration, dethatching, and more.
  • Trust (10): What do customers say after their lawn has been serviced? Does this company offer a guarantee? We considered how satisfied customers are post-service if the company does what it says it will, BBB accreditation, and service guarantees.
  • Prices (10): How reasonable are the costs of the plan or service in comparison to the industry average? We compared the costs of each company to competitors that offer the same lawn services.
  • Unique perks (10): Does the company offer discounts or special services such as organic treatments, pest control, or a mobile app? We looked for perks each company offers that set them apart from the competition.
  • Customer Service (10): How is the customer experience when contacting the company? We considered the speed of response, weekend/holiday availability, and ease of communication through phone calls, email, and online chat functions.
  • Nationwide availability (10): How many states does the company offer its services? Companies that operate nationally and in all zip codes are favored over those with limited availability. 

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