

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










| 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 |
K**I
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.
R**E
Great worms castings and amendment to your soil
Great worms castings and amendment to your soil
B**N
YES. It does smell like worm dirt!
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.
A**R
Good product
Nice product, well packaged. I called the help line to ask some questions and they were really--helpful! Got a live person even! My red wiggler worms seem to like it.
C**S
Plants love this.
Won’t burn your plants. Wish it had a better packaging to keep it from drying out.
S**A
Compost Review
Such a great value! My garden loves this stuff!
M**T
Pleaseantly Surprised
I received them earlier than expected and the worms came ready to work! Worms varied in sizes, and they were super eager to dive straight down into my garden beds! Will definitely recommend this company to my other gardeners.
S**Y
FUNGUS GNATS AND OTHER CRAP
The absolute worst example of thievery out there. Nothing but two overpriced bags of fungus gnats and other insects that are harmful to one's garden. I WILL NEVER PURCHASE FROM THIS SELLER AGAIN. SADLY, I ONLY LEARNED THAT THE CRAP IS NOT UP TO PAR AFTER DISPENSING THE ALLEGED BLACK GOLD. CHEAP SELLER IS NOT WILLING TO DO THE RIGHT THING. SHAME ON THEM!!
Trustpilot
3 days ago
2 weeks ago