Sub Zero (32.012% THCa) – Premium THCa Flower

Sub Zero is a Hybrid THCa flower strain, most widely documented as Super Boof × Oreoz and credited to GrowMoreFire Genetics. This living soil batch tests at 32.012% THCa with 34.172% total cannabinoids and 1.87% total terpenes, led by limonene and caryophyllene almost in a dead heat. It is the most potent flower in this release on every cannabinoid measure — highest THCa, highest total THC and highest total cannabinoids.

Overview

Sub Zero is a Hybrid strain grown here in living soil. This batch tests at 32.012% THCa, 28.229% total THC, and 34.172% total cannabinoids, with Δ9-THC at 0.154% and total CBD at 0.059%. The minor cannabinoid fraction is led by CBGa at 1.468%, followed by CBCa 0.225%, THCVa 0.160%, CBDa 0.067%, CBG 0.046%, Δ8-THC 0.029% and CBDVa 0.011%.

Total terpenes come in at 1.87%, and the top of the panel is a near-tie: limonene 0.49% (26% of the profile) and trans-caryophyllene 0.47% (25%). β-Myrcene 0.35% (19%) is a solid third, giving the profile more body than a pure citrus-and-spice stack would have. Behind those three: linalool 0.14%, α-humulene 0.14%, menthol 0.09%, endo-fenchyl alcohol 0.07%, β-pinene 0.06%, α-pinene 0.05% and cis-β-ocimene 0.02%.

The top four terpenes here — limonene, caryophyllene, myrcene and linalool — are the same four reported in the one independently lab-tested Sub Zero review we could find. The order differs and that grow ran a higher total, which is ordinary batch-to-batch variation, but the character of the profile matches what Sub Zero is known for.

Highlights

• Potency: 32.012% THCa — highest THCa of our four newest batches
• Total THC: 28.229%
• Total CBD: 0.059%
• Total Cannabinoids: 34.172% — highest in this release
• Total Terpenes: 1.87%
• Minor Cannabinoids: CBGa 1.468%, CBCa 0.225%, THCVa 0.160%, CBDa 0.067%, CBG 0.046%
• Top Terpenes: Limonene (0.49%), trans-Caryophyllene (0.47%), β-Myrcene (0.35%), Linalool (0.14%), α-Humulene (0.14%)
• Type: Hybrid
• Grow Method: Living Soil
• Lineage: Super Boof × Oreoz (GrowMoreFire Genetics) — the most widely documented of several cultivars sharing the name
• Experience: Euphoric onset, relaxed and heavy-bodied finish, cool mint and citrus over cookie and gas, evening-leaning

Aroma and Flavor

Break a bud open and the first thing you get is bright citrus from 0.49% limonene, with a peppery, warm undertone from the 0.47% caryophyllene sitting right beside it — at this ratio neither one gets to dominate. The 0.35% myrcene rounds the base out into something earthier and sweeter, and that is where the cookie-cream side of the Oreoz parent comes through.

On the palate, independent descriptions of Sub Zero land repeatedly on mint, diesel and earth, with sweet fruit and creamy cookie notes in the GrowMoreFire cut. In this batch that reads as citrus and cream on the draw, a gassy, peppery middle, and a cool exhale — the 0.09% menthol and 0.14% linalool add a clean, slightly floral chill to the finish that suits the name.

Effects and Usage

Published descriptions of Sub Zero consistently call it relaxing, euphoric and happy, with a build that starts in the head and settles into a heavy body. Reviewers of lab-tested cuts describe it as on the sedating end of hybrid.

This batch fits that read. Limonene and caryophyllene make for a bright, mood-lifting start, and myrcene at 0.35% supplies the body weight that carries the second half. We would put Sub Zero in the late-afternoon-into-evening slot — winding down, a movie, a long dinner — rather than as a focus strain. At 32.012% THCa and 34.172% total cannabinoids, this is the strongest flower in this release; if you are not used to this potency band, start with a small amount and give it time.

Strain Background

The Sub Zero most people mean is Super Boof × Oreoz, credited to GrowMoreFire Genetics by both Leafly and Weedmaps and grown under that cross by licensed cultivators in Vermont, Maine and Illinois. You will also see it labeled "Sub Zero #12," which refers to a selected phenotype of the same cross rather than a separate line. No release year is documented.

• Super Boof is Black Cherry Punch × Tropicana Cookies, bred by Blockhead and named Leafly's 2024 Strain of the Year. We carry it — see our Super Boof THCa flower.
• Oreoz is Secret Weapon × Cookies and Cream from 3rd Coast Genetics, and is where the cookie-cream sweetness in this family comes from.

Other strains share the name. North Genetics sells an unrelated "Subzero" listed as Strawberry Diesel × (Chemdawg × Hindu Kush), and at least one other seed company's Sub Zero appears online with yet another lineage. We describe this flower by its COA and treat the GrowMoreFire cross as the most likely identity, without claiming more than the record supports.

No awards. Sub Zero has no documented cup win in any category. Super Boof's Strain of the Year title belongs to the parent, and it is an editorial market award rather than a judged competition. We are not presenting either as an award for this flower.

Also searched as: Subzero, SubZero, Sub Zero #12.

Lab Tested and Verified

• Testing: Third-party lab tested
• Sample ID: 2609CCH1342.7510
• Date Tested: 09/09/2026 · Reported: 09/09/2026
• THCa: 32.012%
• Δ9-THC: 0.154%
• Total THC: 28.229%
• Total CBD: 0.059%
• Total Cannabinoids: 34.172%
• Total Terpenes: 1.87%
• Moisture: 6.3%
• Water Activity: 0.455 aw
• Safety Panels: Pesticides, heavy metals, microbials and mycotoxins — all Pass

A full Certificate of Analysis (COA) is available — see the linked PDF on this product page.

Frequently Asked Questions

Is Sub Zero Indica or Sativa?
Sub Zero is a Hybrid. Leafly and Weedmaps both classify it that way, and AllBud calls it a balanced 50/50. In practice it presents on the relaxed, body-forward side of hybrid.

What does Sub Zero taste like?
Citrus and cream on the draw, a peppery, gassy middle, and a cool, slightly minty exhale. Limonene (0.49%) brings the citrus, caryophyllene (0.47%) the pepper, and myrcene (0.35%) the sweet, earthy base.

What is the dominant terpene in this Sub Zero batch?
Limonene at 0.49%, by a hair — trans-caryophyllene is right behind at 0.47%, and together they make up just over half of the 1.87% total. β-Myrcene is third at 0.35%.

What are the parents of Sub Zero?
The widely grown Sub Zero is Super Boof × Oreoz, credited to GrowMoreFire Genetics. An unrelated North Genetics strain with the same name exists, so lineage depends on the source.

Has Sub Zero won any awards?
No. There is no documented cup win for Sub Zero. Its parent Super Boof was Leafly's 2024 Strain of the Year, but that honor belongs to the parent.

How potent is this batch?
32.012% THCa, 28.229% total THC and 34.172% total cannabinoids — the highest readings in this release on all three.

Storage Instructions

Store Sub Zero in an airtight container in a cool, dark, dry place, away from direct sunlight and heat. Limonene and linalool are the most volatile terpenes in this profile, and they carry the citrus and the cool finish — protect them and the flower keeps its character.

thisthat Quality Standards

All thisthat flower is slow-cured, hand-trimmed, and third-party lab tested. Our products comply with federal hemp regulations and are shipped discreetly to qualifying states. Each batch is evaluated for potency, moisture balance, and overall quality before it reaches you.

Legal and Medical Disclaimer

This product contains hemp-derived THCa and complies with the 2018 Farm Bill. Not intended to diagnose, treat, cure, or prevent any disease. Must be 21+. Do not use if pregnant or nursing. Check local laws before purchasing or consuming.