---
product_id: 20057944
title: "Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs"
brand: "uncle jim's worm farm"
price: "€ 42.92"
currency: EUR
in_stock: true
reviews_count: 8
category: "Uncle Jim's Worm Farm"
url: https://www.desertcart.ie/products/20057944-uncle-jims-worm-farm-black-gold-worm-castings-compost-fertilizer
store_origin: IE
region: Ireland
---

# 5x richer nitrogen 7x richer phosphates 11x richer potash Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs

**Brand:** uncle jim's worm farm
**Price:** € 42.92
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow smarter, not harder — unleash the power of Black Gold!

## Quick Answers

- **What is this?** Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs by uncle jim's worm farm
- **How much does it cost?** € 42.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/20057944-uncle-jims-worm-farm-black-gold-worm-castings-compost-fertilizer)

## Best For

- uncle jim's worm farm enthusiasts

## Why This Product

- Trusted uncle jim's worm farm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Legacy:** From the largest worm farm in the US with 50+ years of expertise—quality you can count on for your garden’s success.
- • **Nutrient Powerhouse:** Supercharge your soil with 7x phosphates, 5x nitrogen, and 11x potash for unstoppable plant growth.
- • **Organic & Sustainable:** Harness the natural magic of red wriggler worms turning your food scraps into black gold—eco-friendly gardening at its finest.
- • **Deep Composting Expertise:** Decades-old worm beds ensure thorough composting beyond surface layers, delivering premium aerated soil.
- • **Reduce Waste, Boost Growth:** Turn kitchen scraps into nutrient-rich fertilizer and join a community committed to reducing landfill waste and chemical use.

## Overview

Uncle Jim's Worm Farm Black Gold Worm Castings is a 4-pound organic fertilizer packed with nutrients 7x richer in phosphates, 5x in nitrogen, and 11x in potash compared to average soil. Raised in decades-old worm beds by the largest US worm farm, this premium compost enhances soil aeration and plant health while promoting sustainable gardening by recycling food waste into nutrient-rich earthworm castings.

## Description

desertcart.com : Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs : Patio, Lawn & Garden

Review: Great product/Amazing customer service 👏 - The item was great. My sunflowers seem to love the dirt and they are growing with no yellowing of the leaves. Yay!! But I want to give a shout out to the sellers. The item was delivered to the wrong address and I wasn't able to locate. They took immediate action and I had a new item within a few days. I even reached out to advise the original package was brought to me by my neighbors and ofdered to pay for the second one and they were gracious to say that I dont need to do so. Props to great customer service.
Review: Great worms castings and amendment to your soil - Great worms castings and amendment to your soil

## Features

- Worm Castings Organic Fertilizer: Our worms are raised in worm beds that are decades old and work all layers of the compost, not just the top few inches, creating a wholly better compost. The worm casting mix is full of nutrients and aerated by the earthworm colony, providing the best possible growing base for plants.
- Black Gold Worm Castings: Using live earthworm castings for gardening and plant growing purposes can benefit any garden or farm soil. The food scraps and waste the worms consume in the compost bin gets digested and transformed into some of the most nutritious earth material that lawns and gardens could grow in: worm castings!
- Organic Worm Castings: The worm castings produced by our worms are 7 times richer in phosphates, 5 times richer in nitrogen, and 11 times richer in potash than average lawn soil. The ample supply of nutrients provided by each worm composter helps your garden to grow healthier plants and this valuable substance is all a result of your trash!
- Composting Worms Help the Earth: By feeding food scraps to compost worms instead of throwing them away, we all help to recycle nutrients and keep less trash in landfills. Using worm castings also reduces the need for harmful earth-destroying chemicals, instead relying on safe, organic compost production.
- Uncle Jim's Worm Farm: We've been in business for over 50 years, using over 40 acres of land, the largest worm farm in the US! We're a “Down to Earth” company and handle the whole process of growing and farming composting worms for the market from start to finish. All of our worms are proudly raised in the USA. Here at Uncle Jim's, we really know worms!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B013ZU4AB6 |
| Best Sellers Rank | #146,684 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,702 in Garden Fertilizers |
| Customer Reviews | 4.5 4.5 out of 5 stars (642) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4 pounds |
| Manufacturer | Uncle Jim's Worm Farm |
| Product Dimensions | 8 x 3 x 10 inches |

## Product Details

- **Brand:** Uncle Jim's Worm Farm
- **Item Weight:** 4 Pounds
- **Item Form:** Granules
- **Coverage:** Full
- **Specific Uses For Product:** Gardening,Lawns,Organic

## Images

![Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs - Image 1](https://m.media-amazon.com/images/I/71RhNXCF2dL.jpg)

## Questions & Answers

**Q: Is this the real uncle jim company not a resellers?**
A: I'm just chiming in to say I just saw an add for The Real Uncle Jim product for Composting Worms, right here on the same page.
  "A day late, a dollar short", maybe, but I just thought I'd add that in after seeing the add here, right after your question.
 Hope the garden's doing well!

**Q: Do I leave in black bag i received or a  big compost pile**
A: Depends on what you are needing them for. I just introduced them right into my 15 gallon fabric pots right away, but they will certainly work good in a compost pile or straight into your garden. The black bag is just made for transport as they do not like sunlight. Enjoy natures best all natural fertilizer  :-)

**Q: How to keep worms alive mine died once  in compost**
A: Worms need warm but not hot conditions, if they get too hot it will cook them! try to keep the container they will live in between 60 degrees and 75 degrees and keep it in the shade. Hopefully you are using a multi shelf earthworm compost bin that is designed for them. As for feeding, sprinkle1/2 cup fresh as possible cornmeal and 1/4 teaspoon azomite rock dust per 2 gallons of dirt or mulch you are bedding them in. This gives them an instant food source as well as a range of vital micronutrients. For other feeding besides your random scraps, I'd advise you to locate raspberry or blackberry leaves from plants that have not had any chemicals sprayed on them. They LOVE those leaves!! You have to be careful with leaves from trees. A lot of trees actually put a killing chemical in their leaves to keep other plants from growing near them and this can affect the outcome of your compost! So research the species of leave you have in your area first before putting any in your worms. No meat, no cooked veggies, no seasonings, only a TINY bit of citrus fruits! Bake your egg shells before crushing them up in the oven at 250 degrees for 20 minutes. If you have a little blender like a magic bullet that can pulverize the egg shells that is best. The worms will make fast work and add that great calcium to the compost. If you don't have one already, spend the $12 on the PH and temperature tester!!! As the worms eat and poop the compost gets more and more acidic! You have to make sure you keep adding stuff for them to crawl up into away from the acidic poop concentrated on the bottom. And keep draining the tea out and removing the finished compost weekly. Hence why the earthworm bins work great. Otherwize they could get sick. Also, if you built your own bin for them to live in it could be too small and either cooking them or freezing them, It could be leaching chemicals from plastic if you are using sterilyte tubs that kills them, or if you built a wooden compost bin, the wood could contain arsenic as a wood treatment, especially if it is pallet wood! Use only food grade polypropelene plastic for growing worms. Others leach into the worms and their castings! Make sure you are chopping your food up for them really small. they CAN eat larger chunks but it takes them a lot longer and might not be able to eat it fast enough. They absolutely love starfruit! try not to put green clippings in in large amounts. If you have a food dehydrator you can take your grass clippings and run them through HALF a dehydration setting and this will cut down on the green in a good way for the worms! remember they don't eat the green grass outside, they eat the yellow dead stuff that fell off the trees and usually live in piles of leaves.  use coffee grounds very sparingly. a little they like, too much will kill them. No more than half a cup of coffee grounds in 2 gallons of their bedding! They need to be slightly moist at all times but not WET. if you keep them too wet they will drown. But don't let the dry out either! Hoe all this helps! Happy gardening!

**Q: How should I store the black gold compost before I start using it next week?**
A: Keep in a cool garage/ shed/ cellar and out of direct sun light.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product/Amazing customer service 👏
*by K***I on September 21, 2025*

The item was great. My sunflowers seem to love the dirt and they are growing with no yellowing of the leaves. Yay!! But I want to give a shout out to the sellers. The item was delivered to the wrong address and I wasn't able to locate. They took immediate action and I had a new item within a few days. I even reached out to advise the original package was brought to me by my neighbors and ofdered to pay for the second one and they were gracious to say that I dont need to do so. Props to great customer service.

### ⭐⭐⭐⭐⭐ Great worms castings and amendment to your soil
*by R***E on October 14, 2025*

Great worms castings and amendment to your soil

### ⭐⭐⭐⭐⭐ YES. It does smell like worm dirt!
*by B***N on January 22, 2024*

Before buying, I read all of the negative reviews and I took the chance anyway. First off, I have purchased it twice, and I am ready to buy this additive again. Yes, people, it has an odor, and anyone who tells you that isn't a good thing - never raise worms and nightcrawlers or they would have known exactly what they were getting into. It smells like worm dirt, and I mean that in the best possible way. This is the real deal. The next item that Uncle Jim's is taking so much heat over is "Here thar be bugs". Now, most of the people with these negative reports also "claim" that they have composted and dealt with worm castings for years. Think it thru friends, how does a person do anything that deals with the items used for compost and worm dirt (with 15 to 20 tiny red wigglers alive on arrival) and not end up with a few unwanted buggy critters? So far out of only 2 bags I may have gotten 10-20 bugs of a flying sort total. Mind you, those aren't the little critters people are saying is infested in the soil. They are talking about very tiny white bugs that your bag will have in there also. They DO NOT eat the plants. They deal with unwanted bugs who do attack the plant, and they set the balance for the bacteria in the soil. If they are in the soil and doing their jobs well, you will see them stand to every time you water your plants. They are one of very few bugs that we WANT in our soil. TLDR: It is obvious to me that these folks have been doing this for a very long time, and they are doing it better than most others.

## Frequently Bought Together

- Uncle Jim's Worm Farm Black Gold Worm Castings Compost Fertilizer for Garden Soil | Red Wriggler Earthworm Casting Organic Fertilizer for Plants | Nutrient Rich Fertilizer Solutions | 4 lbs
- Uncle Jim's Worm Farm 100 Count Red Wiggler Composting Worms Mix for Garden Soil or Fishing | Starter Pack of Compost Worms Improves Soil Structure and Quality for Healthier Gardens
- Uncle Jim's Worm Food (1 Month)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-23*