Flagship
Non-Granular
CarbonizPN Soil Enhancer
Our flagship soil enhancer
$59.00
- Sizes
- 40 lb bag, super sack
- Rate
- Spread 20-40 lbs. per 1,000 SF.
Compost + biochar soil amendments
Healthy plants start with healthy soil.
Mirimichi Green makes compost and biochar soil amendments in Castle Hayne, North Carolina. Carbon-based soil amendments and beneficial microbes build and maintain healthy soil. We make them under our own brands, and under yours.
1,414Distributor locations
48States stocked
4.7/5364 customer reviews
Trusted on courses, fields, tracks, and campuses nationwide
A note from Mirimichi Green
Fewer Products. Better Soil.
For years we've made a full line of biostimulants, fertilizers, and natural pesticides, along with Peat Alternative, next to our core soil amendments. They're good products, and many of you built programs around them. We're proud of that work.
But raw materials, packaging, and freight keep getting more expensive, and the way the market buys these inputs has changed. We can no longer make that full line at a price that's fair to you and workable for us. Rather than cut corners, we're choosing focus.
Mirimichi Green is going back to what we started with and what we do best: manufacturing high-quality compost and biochar soil amendments. We'll make them under our own brands and for partners who want their name on the bag. They'll still reach you through the same distributors you buy from today.
The Mirimichi Green team · Castle Hayne, NC
No change
Soil Amendments
CarbonizPN®, CarbonizPN®-G, and ByoSpxtrum™ continue with the same formulas, the same bags, and the same distributors.
While supplies last
Biostimulants, Fertilizers, Pesticides + Peat Alternative
We're phasing these out. What's left is still for sale online and at participating distributors until it runs out. See the list »
Growing
Distributors + Partners
Same nationwide network. Pallet, supersack, and truckload orders still go through your regional manager. Private label »
Soil Amendments
The Lineup: 3 Products Built on Biochar
Each one starts with USDA Certified Biobased Carbon, compost, or beneficial microbes, and usually all three. Pros can get contractor pricing from their local distributor.
Flagship
Granular
CarbonizPN-G Granular Soil Enhancer
Spreadable granular soil enhancer
$61.99
- Sizes
- 40 lb bag, super sack
- Rate
- Spread 20-40 lbs. (½-1 bag) per 1,000 SF.
Water Activated Powder
ByoSpxtrum™
From $85.00
- Sizes
- 17 oz
- Rate
- 3.4 to 6.8 oz per acre (2.2 to 4.4 grams per 1,000…
How it works
CarboMatrix™: Carbon That Stays, Biology That Moves In
Biochar is a porous, long-lasting carbon. We charge it with premium compost and inoculate it with beneficial bacteria and fungi. The char stays in the soil, holding water and nutrients where roots can reach them and giving microbes a permanent place to live.
- Builds a living soilUSDA Certified Biobased biochar creates habitat for beneficial microorganisms.
- Improves soil structureBetter aeration and less compaction let roots grow deeper while water infiltrates and stays.
- Feeds beneficial microbesPremium compost fuels the soil food web for more efficient nutrient cycling.
- Unlocks and holds nutrientsLocks up heavy metals and makes macro- and micronutrients available when roots need them.
- Stimulates root growthA thriving soil environment drives faster root development and greater root mass.
- Increases water efficiencyPorous biochar holds water and nutrients in the root zone, reducing water needs.
BiocharUSDA Certified Biobased Carbon. Porous, stable, and long-lasting.
CompostPremium organics that feed the soil and charge the char.
MicrobesBeneficial bacteria and fungi, including a patented strain.
Customer reviews
From the Field
Switched from synthetics to an all-organic routine and my yard has never looked better! Mirimichi Green's Carbonizpn-g combined with ByoSpxtrum brought my lawn abundantly back to life.
Great soil amendment. I utilize it with all my topdressing programs.
Mirimichi Green is a major reason why my lawn looks the way it looks. I'm a big fan of all of their products! - Chicago
Where to buy
Three Ways to Buy
Most pros buy from their local supply branch. Need a few bags? Order online. Big job? Get supersack pallets delivered.
How much do you need?
Best for most landscape and turf pros
Buy from a distributor
Pick up at 1,400+ professional supply branches in 48 states, with contractor pricing and a local rep.
- Contractor pricing through your branch
- Pick up same day where stocked
- Bags, pallets, and ongoing programs
Stocked at SiteOne Landscape Supply · Ewing Outdoor Supply · Heritage Landscape Supply Group · Horizon Distributors · Central Pro Supply
Find a distributor
Best for small quantities
Order online
Order a few bags or pouches and have them shipped to your door. Free shipping on orders over $50.
- Ships direct to you
- Free shipping over $50
- Homeowners and small jobs
Best for large jobs and resellers
Buy in bulk
CarbonizPN and CarbonizPN-G in 1- and 2-yard supersacks, about 2,000 lbs per pallet, with live freight quotes to your site.
- Supersack pallets, ~2,000 lbs each
- Instant LTL freight quotes
- Ships from Clinton, NC
Stocked at 1,414 Branches in 48 States
AK
ME1
WI5
VT
NH5
WA43
ID15
MT5
ND1
MN13
IL44
MI27
NY37
MA25
OR18
NV12
WY6
SD1
IA5
IN17
OH25
PA17
NJ26
CT15
RI1
CA212
UT9
CO50
NE21
MO58
KY5
WV1
VA27
MD18
DE4
AZ40
NM9
KS44
AR6
TN21
NC68
SC26
OK31
LA10
MS2
AL17
GA44
HI4
TX150
FL143
None1–910–2425–4950–99100+
Largest partners by branch count
SiteOne Landscape Supply533
Ewing Outdoor Supply217
Heritage Landscape Supply Group173
Horizon Distributors86
Central Pro Supply49
Branch counts from the distributor map, September 2026.
Private label + contract manufacturing
Your Brand. Our Biochar.
We already make co-branded soil products for partners. Now we're opening our Castle Hayne production to distributors, landscape brands, and retailers who want a proven compost and biochar amendment under their own name.
Start a Private-Label Project- Spec the blendStart from CarbonizPN, or adjust the biochar-to-compost ratio and microbial inoculation.
- Sample and trialWe run pilot batches for your field trials, and our agronomy team helps you read the results.
- Brand and packageYour label on bags, supersacks, or bulk, with rate tables and compliance copy included.
- Produce and shipScheduled production runs, shipped by the pallet or the truckload.
Discontinued products
Stock Up While It Lasts
Our biostimulants, fertilizers, natural pesticides, and Peat Alternative are being phased out. Remaining inventory is on sale at the online store and at participating distributors.
| Product | Category | Online from | Status |
|---|---|---|---|
| 4-4-4 Organic Granular Fertilizer | Biostimulants + Fertilizers | $79.99 | Limited |
| Mirimichi Green Peat Alternative | Soil Amendments | $45.00 | Limited |
| Release 202™ | Biostimulants + Fertilizers | $44.00 | Limited |
| Release 901C™ | Biostimulants + Fertilizers | $53.00 | Limited |
| Release Zero™ | Biostimulants + Fertilizers | $53.00 | Limited |
| Nutri-Tree & Shrub™ | Biostimulants + Fertilizers | $46.00 | Limited |
| Nutri-Kelp™ | Biostimulants + Fertilizers | $44.00 | Limited |
| Mirimichi Green Pest Control | Natural Pesticides | — | Sold out |
| Weed Control Concentrate | Natural Pesticides | $150.00 | Limited |
| Weed & Grass Control Spray | Natural Pesticides | $29.00 | Limited |