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Being a gardener or a farmer, you may often wonder, "which worm castings are best?". This article has covered everything you need to know about all worm castings, including organic worm castings, earthworm castings, you name it! 

What Are Worm Castings?

Produced from earthworms, worm castings are a unique kind of organic fertilizer. Earthworm castings are composed of earthworm manure as earthworm waste acts like magic to enrich the soil. Moreover, these castings provide essential minerals to the soil and increase its ability to retain water.

Benefits of Worm Castings

Many chemical fertilizers ruin the crops if used in large amounts. Other fertilizers might contain excessive organic products, which is also not suitable for plants. So, it is necessary to check the ratios when you set out to buy worm castings. However, organic earthworm castings never ruin your crops!

The earthworm castings contain healthy minerals and elements like calcium or manganese. Moreover, these trace elements assist in faster and better plant production by making the soil more fertile.

Best Worm Castings

1. Simple Grow Pure Worm Castings
2. Unco Worm Castings Organic Fertilizer, Wiggle Worm Soil Builder 
3. Life Cycle Organics
4. Dr. Verm's Premium Worm Castings

1. Simple Grow Pure Worm Castings

The people behind SimpleGrow have been a part of the fertilizer industry for years now, meaning they know all the ins and outs to make these products strong enough to handle anything you throw at them without worrying if they are worth the price.

It is no surprise that a company like Simple Grow has plenty of experience in the composting of foods, trees, and scraps. These are things that are needed to produce crops that are necessary for the global population.

100% Natural

The worm castings offered by SimpleGrow are 100% natural, so you won't find any chemicals or unknown components. As a result, these worm castings are ideal if you're concerned about the chemicals and additives that could end up in your food.

Improve the Soil

These worm castings work wonders to improve the aeration of your soil, which also improves its condition as a result. The tiny cylinder-shaped castings allow the plants to get oxygen from the soil. These worm castings prove to be a beneficial soil additive, especially when trying to grow plants that thrive on rich humus.

Full Refund

If you are unsatisfied with the product for some reason, you may contact the company and get a full refund.

Feed your plants with organic ingredients and turn them into the best ones you’ve ever had. SimpleGrow is the best solution for those looking for the best worm castings.


  • The smell is significantly better than most other worm castings
  • There are no chemicals or additives, and the product is 100% natural
  • The castings contain a high amount of nutrients
  • The cylindrical shape of the worm castings allow the plants to receive oxygen


  • You may have to use a greater quantity of the castings than expected

2. Unco Worm Castings Organic Fertilizer, Wiggle Worm Organic Worm Castings

The Unco product is well-known in the fertilizer industry. Farmers and gardeners often look forward to going with the company when searching for the best worm castings and organic fertilizers alike.

Unco Worm Castings selects the healthiest bacteria for growth and teems up with it. So, this action helps in the fastest growth of the plant or crop.

Ample Amount of Moisture

As soon as you buy the worm castings from the company, you will realize how heavy the bag is. Unlike other companies filling the packets and bags with dirt and pebbles, the Unco fertilizer provides a good amount of moisture along with essential plant nutrients for plant growth. Furthermore, a decent amount of water helps keep the beneficial microbes working for almost three months while in the bag.

Multiple Ways of Plant Betterment

These worm castings help plant growth and fight plant diseases in two ways. One of the ways the earthworm castings works is that it gets quickly absorbed by plant roots, which results in faster and better growth of plants. The other form to support plant growth is gradual and slow. In this way, the castings act as organic plant food, helping with significant root growth and health.

The best part is that Wiggle Worm thoroughly rechecks their products before it reaches consumers. The right proportion of organic material, worm bedding, and worm eggs are revised before shipping the organic fertilizer to the market. However, check for any waste products before buying worm castings to ensure that the bag does not contain twigs or bark.


  • Contains only beneficial microorganisms  
  • Supports fast growth of plants 
  • Goes a long way with garden soil, including both indoor and outdoor gardens
  • Supplies plenty of moisture for microbial life
  • High bacterial content for better soil structure 


  • Customers might have the wrong perception about buying castings from other companies 

3. Life Cycle Organics

All the products from Life Cycle Organics are known to be from 100% organic worm castings. The organic fertilizer can work with every type of soil structure. The organic matter present in the worm casting builds up the roots and provides a hormone-like effect on plants. 

Large Proportion of Organic Materials

If we list the benefits of worm castings, Life Cycle Organics will cover more than half of them. Moreover, it is known to have a healthy proportion of worm castings, and a significant proportion is composed of microorganisms, compost piles, cow manure, and tiny bugs. So, before setting these things up, the company ensures that the bugs and cow manure are safe.

Improved Soil Structure

It is well-known that the earthworm castings, organic worm castings, or organic earthworm castings all work better with hummus. These castings help improve the soil's water retention ability. 

Life Cycle Organics helps in plant growth and makes the soil structure better. Moreover, the peat humus presents teams with the soil and helps build essential trace minerals.

Prevention Against Diseases

Life Cycle Organics' worm castings limit root diseases, and the product ensures that plants are safe from fungal diseases. Furthermore, the particular nematodes in the product eat fungus as food, leaving no room to attack the plants.


  • Presence of healthy bugs
  • Organic soil builder improves soil structure 
  • Ideal amount of organic waste for better growth
  • Helps in root development 
  • Healthy bedding materials present
  • Immunity against diseases


  • Expensive
  • Small bags of castings

4. Premium Organic Worm Castings by Dr. Verm

For Dr. Verm's castings, a particular type of worm gets used, making the product unique and a standout front the rest. Worms fed on the raw vegan diet are collected from the worm farm and used in the castings. Furthermore, these worms consume vegetables such as lettuce and eggplants, plus fruits such as oranges and grapefruits. These forms aid in the radical increase in the growth of established plants.

Diet of Worms

Dr. Verm's stance is that all the worms fetched from the worm farm have a strictly controlled diet for the castings. The diet control decreases the time taken by the soil and plants to show better results. Moreover, extracted from the purest vegetable gardens and fruit gardens, the food provided to worms is high quality, increasing plant yield.


  • Environmentally-friendly castings
  • Consistent in quality
  • Good nutritional value
  • No inorganic chemicals fed to the worms


  • Low quality of packaging


Gardeners and farmers highly prefer Wiggle Worm Organic Castings, and it is a much-loved product on the market. Although these worm castings are a bit expensive, the product is one of a kind!

Wiggle Worm provides organic castings suitable for soil aeration and fruit production. Other worm casting companies like Dr. Verm's and Life Cycle Organics prove themselves best for outdoor plants. So, if you're wondering which worm castings are the best, these picks are a sure fit for your garden and potted plants.

Grow Bigger Plants with Simple Grow

Do you wish your plants would grow bigger? Was your garden less than it should've been last year?

If you're tired of growing puny vegetables and fruits, it's time for an upgrade...Simple Grow Worm Castings!

What are worm castings? Another term for worm manure. Why would you want to use it in your garden, raised beds, and house plants? Because it makes them grow bigger, faster and healthier...with no chemicals!

How do worm castings do this? It's like giving your plants a powerful multivitamin with everything they need to grow. Trace minerals, nutrients, and most importantly...worm castings are chock full of beneficial microbes. Why does that make a difference?

In recent years, we've learned the importance of gut bacteria for humans and know that it impacts so many different parts of our health. The same thing applies with worms. Gut bacteria from the worm's digestive tract gets into the soil from the worm castings and promotes plant health. Plants have a symbiotic relationship with the microbes from the worm's digestive tract. Plants respond to it and grow really big...really fast!

If you've never tried worm castings before, you owe it to yourself to give them a try. Instead of using traditional chemical fertilizers from the big box store, why not try fresh, certified organic worm castings this year? You'll be able to grow bigger, healthier plants that you actually can feel good about eating. 

Take advantage of our special bundle sale on 25lb bags today!


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