Best Worm Castings – Our Top 5 Products to Buy [2022 Update]

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The rising interest in organic farming has put increased value on worm castings in recent times. But they can take a lot of work to produce yourself!

Unlike chemical fertilizers, worm castings are 100% organic and offer a sustainable alternative to increase agricultural production without degrading the quality of the soil.

Many farmers have started producing their own worm castings in their backyard. If you don’t want to go through the hassles of maintaining a worm farm, you can always get some from your nearest vendor.

But which are the best worm castings for sale on the market today?

In this article, we will be talking about the top 5 best worm castings so that you can make an informed purchase decision.

In a Rush? Here are Our Top Picks:

Top 5 Best Worm Castings

1. Unco Worm Castings

Up first is our undisputed king of commercial worm castings – Unco Pure Worm Castings.

They produce one of the best organic fertilizers that met all of our farming needs. They made our plants and vegetables grow visibly faster and with far more volume.

Our tomatoes were the BIGGEST we’ve ever seen them!

This stuff definitely provided the necessary minerals and nutrients to our plants, in fact, it was like putting them on steroids.

We love that they outline their entire process for creating a PURE high quality worm casting product, where other brands are not so pure.

If you are looking for worm castings for both indoor and outdoor use, you should definitely consider Unco as it is also odor free.

The product is so effective that even a small quantity is enough to revitalize a plant.

Unco comes with plenty of benefits as listed below, but it the 4.5lb bag is a little more expensive than other brands – the 15lbs bag is super value.


  • Accelerates the growth of plants
  • Suitable for both indoor and outdoor plants
  • Odor is removed
  • Pure and high quality worm casting


  • 4.5lb bag is quite expensive. Buy the 15lbs.
  • Some rare complaints about root aphids in the product. If this happens, a simple organic insecticide will get rid of them.

2. Worm Gold Plus Worm Castings

Worm Gold Plus stands out among its competition as a pure natural organic fertilizer to increase the overall yield. Like Unco, it is also odor free and safe for any types of fruits and vegetables.

You won’t have to worry about castings burning your plants with Worm Gold Plus. You can use it by mixing the castings in the soil as well as individually on each plant.

The unique feature of this product is the use of volcanic rocks which speed up the release of essential nutrients and minerals that are instantly absorbed by the plants.

However, there was a basic flaw in its packaging – it comes without a sealing zipper and we would have liked to have zipped our unused castings up. Not too big of a deal if you’re going to use it all at once.


  • Excellent choice for increasing yield
  • Odorless castings
  • Doesn’t burn plants
  • Volcanic rocks up the release of nutrients


  • Design flaw in packaging (No sealed zipper)

3. Plantonix Worm Castings

Are you worried about your plants getting dehydrated? If that’s the case, Plantonix worm castings are effective in increasing the water retention capacity of the soil in your garden.

The castings come with humic acid that plays a vital role in maintaining the soil’s moisture level. It also works as a catalyst to combine minerals to form high quality organic compounds that are easily absorbed by plants.

You can use the worm castings in several ways. You can mix it with soil, use as a top dressing, or make a composting tea.

The castings are rich in bacteria and fungi that helps in the faster development of plant roots.

Since it is highly water absorbent, we suggest you to keep it away from the plants that don’t do good without higher moisture level.

One of the biggest plus points is Plantonix has a refund or exchange policy if you are not satisfied with its worm castings.


  • Most suitable for the lawns that receive much sun but less rain.
  • Its water-absorbent quality helps to rehydrates plants
  • Money-back guarantee
  • 100 percent organic, vegan, and non-GMO with no harmful chemicals
  • Humic acid helps to keep the soil moist


  • Not suitable for plants that don’t do well with much water

4. VermisTerra Standard Organic Worm Castings

VermisTerra is a popular earthworm casting brand and for good reason. It’s pretty darn effective.

They say their product is odor free and just smells like fresh rain, and we’d be inclined to agree. Smelling it took us to a rainy day.

If you want to increase the production of flowers, vegetables and fruit in your garden, you should consider using VermisTerra.

The castings are prepared to be dry and ours arrived fine like a powder to facilitate easy mixture with other gardening ingredients.

We added around 20% into our potting soil mix and found quickly improved plant health and made our fruits increase in size pretty rapidly.

A must have for sad looking plants!

On the downside, we and a few other users noticed that some batches came a little bit dry compared to other brands.


  • Attracts pollinators for increasing production of flowers and fruits
  • USDA and CDFA certified product
  • Packaged in resealable pack for future storage
  • Smells like fresh rain (if you’re into that!)


  • Some batches can arrive a little dry

5. Life Cycle Organic Worm Castings

This casting lives up to its name. There are literally living bugs and microorganisms moving inside the package. Don’t worry. They are not pests and will not eat your plants, but actually help them.

Confirmed by Life Cycle Organics themselves, “These tiny compost bugs and microrganisms indicate a healthy batch of castings! They improve your soil further by pooping out nutrients your plants can access”

Their job is to facilitate better air flow in the ground to maintain health of soil and protect the roots from waterlogging.

Once you apply the castings to your garden, the organisms will continue their life cycle of reproducing, eating, and pooping to enrich the soil. They will do their job without you having to supervise them.

The castings are rich in humus that enhances aeration and water retention in soil.

The product comes in a relatively small package for our liking and at a higher price tag. But as with most other brands, if you decide to buy their bigger bag, the price becomes much better value.


  • Healthy bugs and microorganisms help to improve air flow in the ground
  • Accelerates germination of plants and seedlings
  • Rich in humus
  • Helps prevent fungal diseases in plants


  • Relatively expensive for small bag
  • Big bag doesn’t come with a zip lock (small bag does)

Summing Up

Our personal favorite is the Unco brand of earthworm castings but we have had good batches from each of these brands and so have others.

The brand you go for will most likely depend on what worm castings near you are available.

The commercialization of worm castings has led to the emergence of various brands that claim to bring different sets of benefits to your garden.

Consider the type of plants you are growing and take time to go through the features, pros, and cons of the selected products. It’s worth the time and effort.

Worm Casting is the future of sustainable organic farming. It’s about time that you embarked on the journey too – enjoy!