The best worm castings we have ever carried.
Most bagged castings run forty to fifty dollars and you never quite know what is in the bag. These are different, and yes, they cost more. They come from a single family farm in Western Colorado, made in small batches, restocked fresh every couple of weeks, and alive with a level of biology and nutrient density we could not find anywhere else. We were impressed enough to make a full video about them and pay for lab testing to prove it.
Here is exactly what you are paying for.
We are not going to pretend this is a bargain bag. It is a premium product with a premium price, and every dollar has a reason behind it.
It tested higher, so you use less
We paid for the lab testing ourselves. The people who make these castings did not, because we wanted the real numbers before we stood behind them. It came out well ahead of other bagged castings on nutrient density. Growers tell us over and over that a little goes a long way, which stretches every bag further than the sticker suggests.
A living ecosystem, included
Alex hand-adds Red Wigglers to every bag, and each one also carries cocoons along with beneficial life like predator mites and rove beetles. Bought separately, that kind of biology can run hundreds of dollars. Here it comes right along with the compost, ready to take hold in your soil.
Real compost bedding, not dressed-up peat
Most repackagers bed their worms on dark sedge peat that looks like finished castings. Colorado Worm Company beds theirs on fully finished farm compost, the method taught by ClackamasCoot. It is the difference between something that looks the part and something that is the real thing.
Fresh and fast-moving, never stale stock
Alex brings down fresh castings every couple of weeks and screens about a month's supply at a time, which is how you get the best moisture, texture, and packing. It moves fast and does not sit long, so what reaches you is recently made, moist, and full of life instead of last year's leftovers.
One family, one farm, doing it all by hand.
Colorado Worm Company is Alex and his family on a homestead of more than forty acres along the Uncompahgre River south of Montrose. No employees, no shortcuts. Just a true mom and pop operation that decided to make some of the best castings in the country, and then went and did it.
Alex trucked in a load of high quality apple crates and insulated an entire barn to keep the worms happy through Colorado winters. He runs a modest tractor and a trommel that gently separates the finished castings from the worms. He builds windrow thermal compost, turns it, and only once it is fully finished does it become the bedding and feed for his Red Wigglers, who then get fed BuildASoil products on top of that. There are horses on the property, a closed loop system, and about as small a carbon footprint as you will find.
He even drops a few live worms into each bag by hand as he fills it. A big operation could never do that, and that is the point. We have asked Alex more than once to scale up so we could bring the price down, and every time the answer is no. Quality and family come first for him, always. He likes knowing there are living worms riding along inside every bag of his compost, and once you have used it, you understand why.
This is what craft looks like. It is why the results are what they are, and it is why we are proud to carry it.
Do not take our word for it
We funded independent lab testing ourselves and put the full comparison against other castings on video. See the numbers and decide for yourself.
Guaranteed to arrive moist, rich, and alive. If it does not outperform your expectations, we will send a replacement bag or a full refund. Simple as that.
You do not need a microscope.
There is a lot of talk about putting castings under a scope and guaranteeing a microbe count. We think most of that is noise. Biology is always changing, so a number on a certificate does not tell you much by the time the bag reaches you.
The simpler truth is that you can see life with your own eyes. A dry, lifeless pile looks exactly like what it is. A bag of Colorado Worm Company is the opposite: dark, moist, rich, and clearly alive. Between plain castings scooped from a warehouse and something like this, made from finished thermal compost that is visibly teeming with life, there is no contest for which one is more biologically alive.
One honest note on the worms Alex adds by hand. They burrow and move around, so you may not spot them right away, and a few may not survive the trip. Do not be disappointed if you do not see them wriggling the moment you open the bag. The cocoons ride along too, and once you work this into your garden, worms will start to appear. You will have a living ecosystem in your soil. That is our promise.
Straight from the comment section.
"Nothing but phenomenal results. A little bit goes way further than any other castings I've used."
gubbleguyYouTube comment"If you have it, you are almost guaranteed to get good results. The Colorado worm castings are amazing. I won't use any other ever again."
ORGANIXFARMERINCYouTube comment"I've got a bag of CoWoCo from December 2023 that's about 50% used and there's always a few worms in the bag. Absolutely amazing."
Shepp6769YouTube commentA little goes a long way.
Top dress
This stuff is potent, so a light half inch layer goes a long way. Refresh it every two weeks to once a month through veg and flower. You can go heavier without burning, but with castings this strong you usually do not need to.
Compost tea
Add about 1 cup per 5 gallons of aerated water for an overall nutrient and biological boost, brew no more than 24 hours, and apply straight to the root zone.
Sizing note: the 2 Gallon bag is about 10 lbs, the 1/2 Cubic Foot about 20 lbs, and the 1 Cubic Foot about 40 lbs.
Pick the amount that fits your grow.
2 Gallon
About 10 lbs $361/2 Cubic Foot
About 20 lbs $641 Cubic Foot
About 40 lbs $125Because a little goes such a long way, even the premium price stretches further than a bag of standard castings. Buy the size that matches how much soil you are feeding, and free shipping kicks in any time you have two or more eligible items in your cart, including this one.
Put the best in your soil.
When you buy this, you are backing a real family farm doing meticulous, hands-on work, and you are putting the finest castings we have ever tested into your garden. Guaranteed to arrive alive, or we make it right.
Questions first? Our whole team grows, so reach out by chat, email, or phone and we will help you dial it in.
The best worm castings we have ever carried.
Most bagged castings run forty to fifty dollars and you never quite know what is in the bag. These are different, and yes, they cost more. They come from a single family farm in Western Colorado, made in small batches, restocked fresh every couple of weeks, and alive with a level of biology and nutrient density we could not find anywhere else. We were impressed enough to make a full video about them and pay for lab testing to prove it.
Here is exactly what you are paying for.
We are not going to pretend this is a bargain bag. It is a premium product with a premium price, and every dollar has a reason behind it.
It tested higher, so you use less
We paid for the lab testing ourselves. The people who make these castings did not, because we wanted the real numbers before we stood behind them. It came out well ahead of other bagged castings on nutrient density. Growers tell us over and over that a little goes a long way, which stretches every bag further than the sticker suggests.
A living ecosystem, included
Alex hand-adds Red Wigglers to every bag, and each one also carries cocoons along with beneficial life like predator mites and rove beetles. Bought separately, that kind of biology can run hundreds of dollars. Here it comes right along with the compost, ready to take hold in your soil.
Real compost bedding, not dressed-up peat
Most repackagers bed their worms on dark sedge peat that looks like finished castings. Colorado Worm Company beds theirs on fully finished farm compost, the method taught by ClackamasCoot. It is the difference between something that looks the part and something that is the real thing.
Fresh and fast-moving, never stale stock
Alex brings down fresh castings every couple of weeks and screens about a month's supply at a time, which is how you get the best moisture, texture, and packing. It moves fast and does not sit long, so what reaches you is recently made, moist, and full of life instead of last year's leftovers.
One family, one farm, doing it all by hand.
Colorado Worm Company is Alex and his family on a homestead of more than forty acres along the Uncompahgre River south of Montrose. No employees, no shortcuts. Just a true mom and pop operation that decided to make some of the best castings in the country, and then went and did it.
Alex trucked in a load of high quality apple crates and insulated an entire barn to keep the worms happy through Colorado winters. He runs a modest tractor and a trommel that gently separates the finished castings from the worms. He builds windrow thermal compost, turns it, and only once it is fully finished does it become the bedding and feed for his Red Wigglers, who then get fed BuildASoil products on top of that. There are horses on the property, a closed loop system, and about as small a carbon footprint as you will find.
He even drops a few live worms into each bag by hand as he fills it. A big operation could never do that, and that is the point. We have asked Alex more than once to scale up so we could bring the price down, and every time the answer is no. Quality and family come first for him, always. He likes knowing there are living worms riding along inside every bag of his compost, and once you have used it, you understand why.
This is what craft looks like. It is why the results are what they are, and it is why we are proud to carry it.
Do not take our word for it
We funded independent lab testing ourselves and put the full comparison against other castings on video. See the numbers and decide for yourself.
Guaranteed to arrive moist, rich, and alive. If it does not outperform your expectations, we will send a replacement bag or a full refund. Simple as that.
You do not need a microscope.
There is a lot of talk about putting castings under a scope and guaranteeing a microbe count. We think most of that is noise. Biology is always changing, so a number on a certificate does not tell you much by the time the bag reaches you.
The simpler truth is that you can see life with your own eyes. A dry, lifeless pile looks exactly like what it is. A bag of Colorado Worm Company is the opposite: dark, moist, rich, and clearly alive. Between plain castings scooped from a warehouse and something like this, made from finished thermal compost that is visibly teeming with life, there is no contest for which one is more biologically alive.
One honest note on the worms Alex adds by hand. They burrow and move around, so you may not spot them right away, and a few may not survive the trip. Do not be disappointed if you do not see them wriggling the moment you open the bag. The cocoons ride along too, and once you work this into your garden, worms will start to appear. You will have a living ecosystem in your soil. That is our promise.
Straight from the comment section.
"Nothing but phenomenal results. A little bit goes way further than any other castings I've used."
gubbleguyYouTube comment"If you have it, you are almost guaranteed to get good results. The Colorado worm castings are amazing. I won't use any other ever again."
ORGANIXFARMERINCYouTube comment"I've got a bag of CoWoCo from December 2023 that's about 50% used and there's always a few worms in the bag. Absolutely amazing."
Shepp6769YouTube commentA little goes a long way.
Top dress
This stuff is potent, so a light half inch layer goes a long way. Refresh it every two weeks to once a month through veg and flower. You can go heavier without burning, but with castings this strong you usually do not need to.
Compost tea
Add about 1 cup per 5 gallons of aerated water for an overall nutrient and biological boost, brew no more than 24 hours, and apply straight to the root zone.
Sizing note: the 2 Gallon bag is about 10 lbs, the 1/2 Cubic Foot about 20 lbs, and the 1 Cubic Foot about 40 lbs.
Pick the amount that fits your grow.
2 Gallon
About 10 lbs $361/2 Cubic Foot
About 20 lbs $641 Cubic Foot
About 40 lbs $125Because a little goes such a long way, even the premium price stretches further than a bag of standard castings. Buy the size that matches how much soil you are feeding, and free shipping kicks in any time you have two or more eligible items in your cart, including this one.
Put the best in your soil.
When you buy this, you are backing a real family farm doing meticulous, hands-on work, and you are putting the finest castings we have ever tested into your garden. Guaranteed to arrive alive, or we make it right.
Questions first? Our whole team grows, so reach out by chat, email, or phone and we will help you dial it in.