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100% Pure Organic Worm Castings Fertilizer, 30-Pounds - Improves Soil Fertility and Aeration for Houseplants, Vegetables, Gardens, and More – OMRI-Listed and Mineral-Dense

4.8 4.8 out of 5 stars 4,741 ratings

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1 pack

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Brand Wiggle Worm
Item Weight 30 Pounds
Item Form Granules
Coverage Organic
Liquid Volume 1 Cubic Feet

About this item

  • Just a handful will make your plants happy
  • Excellent for houseplants, vegetables, flowers and more Non-toxic and odor free
  • Ideal for use both indoors and outdoors
  • Package weight of the Product: 30 Pounds

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 24 x 15.4 x 4 inches; 30 Pounds
  • Item model number ‏ : ‎ GMWW30
  • Date First Available ‏ : ‎ September 20, 2004
  • Manufacturer ‏ : ‎ Wiggle Worm
  • ASIN ‏ : ‎ B00V4RI88Y
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews:
    4.8 4.8 out of 5 stars 4,741 ratings

Product Description

Help improve plant success in your garden with Wiggle Worm Soil Builder Pure Worm Castings!

Wiggle Worm Pure Worm Castings is 100% pure organic worm castings, unlike other brands that claim they are pure even when they’re not. Ours is not vermicompost that contains manure or uneaten bedding with a small amount of casting. With Wiggle Worm, you can be sure that you’re getting 100% pure and organic earthworm castings - you will see the difference when you see the dark, rich color and texture of our product.

It can help improve the quality of your plant’s soil. It contains tiny, football-shaped particles that help prevent the soil from packing - improving aeration and drainage to allow the roots to grow well. Aside from that, our worm castings can help increase the soil’s water retention capacity, so the roots can absorb the right amount of water they need. It is also a natural insect repellent because it helps control the population of plant pests such as whiteflies, spider mites, and aphids.

Worm Castings is OMRI Listed for Organic Use so it’s an excellent alternative to synthetic fertilizer. Use it as an indoor and outdoor plant fertilizer because it’s natural, odorless, and non-toxic. It’s perfect for vegetables, house plants, flowers, and more.

A little goes a long way with Wiggle Worm Castings because you only need a handful or ½ cup to fertilize or amend your plant’s soil. We recommend applying it to the soil above the root zone three times a year or to the hole during transplant or seeding.

We produce Pure Worm Castings in the UNCO Worm Casting Manufacturing System, a controlled environment, to make sure that our end product is pure. Our facility was developed 40 years ago to control all aspects of the worms’ environment all year round. Additionally, the live earthworms we use are fed with rich organic material so that the castings produced are rich in minerals and trace elements.


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Customer reviews

4.8 out of 5 stars
4.8 out of 5
4,741 global ratings

Customers say

Customers like the moisture content, value, ease of use, appearance and smell of the fertilizer. For example, they mention it's very easy to use and incorporate, and that it'll improve the quality of soil. Some appreciate the quality, casting quality, and smell. That said, some complain about the effect on bugs.

AI-generated from the text of customer reviews

286 customers mention273 positive13 negative

Customers are satisfied with the quality of the fertilizer. They mention that it helps make plants healthy and strong, and it makes exceptional soil for planting. Some say that it makes their vegetable garden a huge success.

"...year's petunias grew 8 feet wide (4 feet each way) and bloomed profusely until frost. Just ordered 90 more pounds." Read more

"...Wonderful results." Read more

"...I cannot plant till May here in zone 4 but last year’s vegetable garden was a huge success! I haven’t used this brand before but should be good...." Read more

"...Plants seem to grow well in it." Read more

206 customers mention184 positive22 negative

Customers like the value of the fertilizer. They mention it's an excellent, quality product that is worth the money. Customers are also impressed with the cost, saying it'll lower their maintenance cost and produce beautiful flowers and veggies. They also appreciate the consistent quality of the castings.

"Good quality" Read more

"Well worth the money if you must have fantastic flower pots...." Read more

"...What a bargain for 30 lbs. I was such a good price with good feedback I had to try it. So now I have 3 brands on hand to compare...." Read more

"...The quality is great! No funky smells either- just the real deal worm castings u can only get from natures own wiggly little friends...." Read more

42 customers mention42 positive0 negative

Customers are satisfied with the appearance of the fertilizer. They mention that it has a gorgeous silky black color, and is rich in color. They also say that their plants look great, vibrant, and vigorous after using the product. Customers also say the product is very consistent in appearance, and looks legit.

"...It is very consistent in appearance. It is produced by UNCO Industries out of Oregon. They have been in business since 1976...." Read more

"...Clumpy and not finely broken up but looks legit." Read more

"...My rose bushes are spectacular with this product!..." Read more

"...Wiggle Worm is organic like I like.Nice and granular not too many clumps.Seems like good stuff.Would purchase again." Read more

38 customers mention38 positive0 negative

Customers are satisfied with the casting quality of the fertilizer. They mention that it's great, organic, and authentic. They also say that it seems like real fresh worm castings, and that it makes a great soil addition. Customers also say the castings are clean and dark in color.

"...There are a lot of little critters running around that you can see with the naked eye too...." Read more

"These worm castings are the very best. We have 14 raised beds in the garden area, we have been using this product for years with excellent results...." Read more

"The worm castings are clean and a wonderfully dark color. I can’t wait to put these in my garden...." Read more

"...What I received is 100% worm castings with no sand. I'm a happy customer." Read more

32 customers mention32 positive0 negative

Customers find the fertilizer easy to use and spread. They say it works great, has perfect directions on the bag, and blends into the soil. Customers also mention that the worms are fine and moist, making them easy to flow through their fingers. They also say it's a quick and easy solution to get vermicomposting soil.

"...Organic Solution - These castings were fine and moist and easy to flow thru your fingers after grabbing a handful...." Read more

"...So, I think this product is a good addition to my mix. I grow species Begonias, by the way." Read more

"easy to use,but cost is why i gave it a 4" Read more

"I love this stuff. We buy some every year, it's just nice to mix in to our soil mix when planting in the spring." Read more

29 customers mention29 positive0 negative

Customers are satisfied with the smell of the fertilizer. They mention that it does not have a bad smell like manure.

"...None of the castings have a bad odor. All of them smell earthy and nice. They all have a nice dark chocolatey brown color...." Read more

"...The quality is great! No funky smells either- just the real deal worm castings u can only get from natures own wiggly little friends...." Read more

"The castings smell good and stay moist and fresh even though I have had it for quite awhile and have just kept it in its bag in the garage...." Read more

"Bag had a lot of clumps but the contents is rich dark black and odorless. It’s better than I’ve experienced I’m sure...." Read more

16 customers mention12 positive4 negative

Customers like the moisture content of the fertilizer. For example, they say it's easy to blend in with potting soil, and has a uniform texture.

"...Organic Solution - These castings were fine and moist and easy to flow thru your fingers after grabbing a handful...." Read more

"The castings smell good and stay moist and fresh even though I have had it for quite awhile and have just kept it in its bag in the garage...." Read more

"I love it but this needs to be in a dry form so we can use it in a spreader on lawn. The casting is too muddy and cannot be used in spreaders." Read more

"...use peat (sustainability issues) nor vermiculite; the castings hold moisture well enough and I only water once a day...." Read more

17 customers mention5 positive12 negative

Customers are dissatisfied with the effect of the fertilizer on bugs. They mention that the bags are infested with fungus gnats, aphid larvae, and little white worms. Some customers also report that the product completely infests their garden box.

"...with the 1st bag as I know off but with this bag little white worms starting Appearing with this bag when I used it to top my plants off...." Read more

"...The plants got infested with BUGS. When I checked inside the bag, it has tons of nasty BUGS. I spent $30.00 just to kill my plants...." Read more

"...High chitonase worm castings are an excellent natural insect repellent. Supposedly you can put them 1/4” thick on fire any beds to get rid of them!..." Read more

"...wet, could almost squeeze the moisture out of it, so it was also full of fungus gnats" Read more

Thru a program of organic amendments like Azomite rock dust to actively aerated compost teas and ...
5 Stars
Thru a program of organic amendments like Azomite rock dust to actively aerated compost teas and ...
I have been building the fertility of my garden soils for the past 4 years since I created the first raised beds. Thru a program of organic amendments like Azomite rock dust to actively aerated compost teas and biochar, I have been putting it all on there. I have been learning all along the way. I decided to kick it up a notch this year with some Worm Castings in bulk. I currently use all my kitchen scrapes for soldier fly larvae so I don't have much left for a worm bin. The idea of another component that needs daily or weekly maintenance and tending wasn't appealing either. I may try an "in-garden" worm tower in the future but for now I was looking for some good castings at a good price. I have been using castings in my AACT (actively aerated compost tea) recipes for several years now and am familiar with a couple of brands. I wasn't sure how this Unco Industries Wiggle Worm brand would compare, but after getting some in, all I can say is that I'm highly impressed.Worm Gold Plus has been my first choice brand for years. But with limited availability here on Amazon, I decided to look at other options. I received in my compost tea kit I ordered this year, a couple of pounds worth from a brand called Organic Solutions. It is also not listed in quantity on Amazon. I finally settled on the 30 lbs bag from Wiggle Worm and took a chance and ordered it. Sold By Amazon with Prime Shipping it was only $24. What a bargain for 30 lbs. I was such a good price with good feedback I had to try it. So now I have 3 brands on hand to compare. If you don’t see it listed for $24 be sure to check out “new available from other sellers”.Here are some photos of all 3. And here are my observations:None of the castings have a bad odor. All of them smell earthy and nice. They all have a nice dark chocolatey brown color.Worm Gold Plus - The bag I have is much more compacted than the other 2 brands. I have to break it apart to use it. There are few clearly defined castings. It is a bit thick like clay. It takes a bit of work and time to break the clods apart especially for adding to your soil mixes where you may want a finer texture. The issue I have with it is that it is/has or is heading toward going anaerobic conditions.Organic Solution - These castings were fine and moist and easy to flow thru your fingers after grabbing a handful. There were lots of little bits of what looks like woody material mixed in. If this material is there to foster and grow more fungi then I will have to say that it is my favorite. There are a lot of little critters running around that you can see with the naked eye too. These castings are produced in California by a family owned company in smaller batches. The food source given to the worms are pre-consumer waste stream products that are free from toxins and contaminants. It is high in chiton and microbes that use chiton as a food source. Supposedly these microbes will live on your plants and provide a deterrent to pests landing on your plants for dislike of getting eaten by these microbes. Also when worms consume chiton it is broken down into chitonase which is then absorbed by the plants and when aphids and the likes begin to feed on the plants that have chitonase in their systems, it as an enzyme will begin to dissolve their exoskeletons. High chitonase worm castings are an excellent natural insect repellent. Supposedly you can put them 1/4” thick on fire any beds to get rid of them! Well I tried it and it actually worked. 3 days later the ant bed was abandoned. I think this has to be my favorite brand of all. I limit using these to my compost teas and prized plantings. But to get 30 lbs worth would cost around $40 or more plus shipping. This is the best stuff around IMO, but I was looking for good quality bulk castings to add in quantity to my transplants and garden beds.Unco Industries Wiggle Worm Castings - These are moist and of a fine texture. It is very consistent in appearance. It is produced by UNCO Industries out of Oregon. They have been in business since 1976. These are also very good quality castings. For bulk application rates these can’t be beat for the price if you order it from Amazon for $24 per 30 lb bag shipped Prime. I have ordered 3 bags of these this year and plan on ordering more. Thank you Amazon.5 stars for an affordable, quality product. Just what I was looking for. Now to get that garden growing with some record size and flavored veggies and fruits. Happy Gardening!
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5.0 out of 5 stars Thru a program of organic amendments like Azomite rock dust to actively aerated compost teas and ...
Reviewed in the United States on April 23, 2016
I have been building the fertility of my garden soils for the past 4 years since I created the first raised beds. Thru a program of organic amendments like Azomite rock dust to actively aerated compost teas and biochar, I have been putting it all on there. I have been learning all along the way. I decided to kick it up a notch this year with some Worm Castings in bulk. I currently use all my kitchen scrapes for soldier fly larvae so I don't have much left for a worm bin. The idea of another component that needs daily or weekly maintenance and tending wasn't appealing either. I may try an "in-garden" worm tower in the future but for now I was looking for some good castings at a good price. I have been using castings in my AACT (actively aerated compost tea) recipes for several years now and am familiar with a couple of brands. I wasn't sure how this Unco Industries Wiggle Worm brand would compare, but after getting some in, all I can say is that I'm highly impressed.

Worm Gold Plus has been my first choice brand for years. But with limited availability here on Amazon, I decided to look at other options. I received in my compost tea kit I ordered this year, a couple of pounds worth from a brand called Organic Solutions. It is also not listed in quantity on Amazon. I finally settled on the 30 lbs bag from Wiggle Worm and took a chance and ordered it. Sold By Amazon with Prime Shipping it was only $24. What a bargain for 30 lbs. I was such a good price with good feedback I had to try it. So now I have 3 brands on hand to compare. If you don’t see it listed for $24 be sure to check out “new available from other sellers”.

Here are some photos of all 3. And here are my observations:

None of the castings have a bad odor. All of them smell earthy and nice. They all have a nice dark chocolatey brown color.

Worm Gold Plus - The bag I have is much more compacted than the other 2 brands. I have to break it apart to use it. There are few clearly defined castings. It is a bit thick like clay. It takes a bit of work and time to break the clods apart especially for adding to your soil mixes where you may want a finer texture. The issue I have with it is that it is/has or is heading toward going anaerobic conditions.

Organic Solution - These castings were fine and moist and easy to flow thru your fingers after grabbing a handful. There were lots of little bits of what looks like woody material mixed in. If this material is there to foster and grow more fungi then I will have to say that it is my favorite. There are a lot of little critters running around that you can see with the naked eye too. These castings are produced in California by a family owned company in smaller batches. The food source given to the worms are pre-consumer waste stream products that are free from toxins and contaminants. It is high in chiton and microbes that use chiton as a food source. Supposedly these microbes will live on your plants and provide a deterrent to pests landing on your plants for dislike of getting eaten by these microbes. Also when worms consume chiton it is broken down into chitonase which is then absorbed by the plants and when aphids and the likes begin to feed on the plants that have chitonase in their systems, it as an enzyme will begin to dissolve their exoskeletons. High chitonase worm castings are an excellent natural insect repellent. Supposedly you can put them 1/4” thick on fire any beds to get rid of them! Well I tried it and it actually worked. 3 days later the ant bed was abandoned. I think this has to be my favorite brand of all. I limit using these to my compost teas and prized plantings. But to get 30 lbs worth would cost around $40 or more plus shipping. This is the best stuff around IMO, but I was looking for good quality bulk castings to add in quantity to my transplants and garden beds.

Unco Industries Wiggle Worm Castings - These are moist and of a fine texture. It is very consistent in appearance. It is produced by UNCO Industries out of Oregon. They have been in business since 1976. These are also very good quality castings. For bulk application rates these can’t be beat for the price if you order it from Amazon for $24 per 30 lb bag shipped Prime. I have ordered 3 bags of these this year and plan on ordering more. Thank you Amazon.

5 stars for an affordable, quality product. Just what I was looking for. Now to get that garden growing with some record size and flavored veggies and fruits. Happy Gardening!
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