Product Name
Star Killer Feminized
RKS GENETICS
CANNASAFE LABORATORIES
Independent Third-Party Verification Lab
2440 Industrial Pkwy West · Hayward, CA 94545
Tel: (510) 555-2240 · lab@cannalytics-coa.com
License #: C8-0000176-LIC
CERTIFICATE OF ANALYSIS
· GENETICS PROFILE ·
DOC ID: CAN-2026-04-SK-0844
Lab verify
cannalytics·coa
cannalytics·coa
RKS genetics
royalkingseeds.es
royalkingseeds.es
LIMITED BATCHGeneration:S1 FEMINIZED·Line:RKS Vault Selection
Phenotype:SK-Pheno #1 (Sweet-Floral)
Client / Brand
Royal King Seeds Ltd.
Strain Genetics
Indica-Dominant Cross (34/66)
Sample ID
RKS-SK-FEM-0844
Batch / Lot Number
SK-2026-0844
Production Date
2026-03-11
Date Received
2026-04-14
Date of Analysis
2026-04-17 — 2026-04-28
RKS Stabilized Line
S1 · Trait-Locked
Verified Genetics
ISO 17025 Co-Signed
Breeder-Selected Phenotype
SK-Pheno #1 of 11
RKS BREEDER NOTES
Batch No. SK-2026-0844 · Limited Batch · Cycle 53
From the RKS Breeding Floor
Our Star Killer line was hand-selected for the resin-coated, compact phenotype that defines this strain at its best. Cohort screening across multiple cycles produces the variation envelope shown in the consistency section; only mothers falling within the envelope are kept in the line. This batch reflects the genetic potential of the RKS Star Killer stabilized line. The line traces to a Blueberry × Bubba Kush cross, with each generation selected to fix the traits that define Star Killer.
Breeding Objective · SK-Pheno #1
- Intensify the dominant terpene expression of the line
- Reduce structural variation across cohort
- Improve mold & powdery-mildew resistance under high-humidity flower
- Lock the flowering window with ≤ 7 day cohort variance
D. Van Royen
Master Breeder · Royal King Seeds
Genetics verified by RKS Breeding Team
Genetics verified by RKS Breeding Team
Total THC
14.6%
Total CBD
0.24%
Total Terpenes
1.85%
Safety
ALL PASS
Cannabinoid Profile
| Analyte | Distribution | Result (%) | mg/g | LOQ |
|---|---|---|---|---|
| THCa | 15.02 | 150.2 | 0.05 | |
| Δ9-THC | 1.43 | 14.3 | 0.05 | |
| CBDa | 0.17 | 1.7 | 0.05 | |
| CBD | 0.09 | 0.9 | 0.05 | |
| CBG | 0.98 | 9.8 | 0.05 | |
| CBC | 0.39 | 3.9 | 0.05 | |
| CBN | 0.10 | 1.0 | 0.05 | |
| Total THC ((THCa × 0.877) + Δ9-THC) | 14.6 | 146.0 | — |
LOQ = Limit of Quantitation. ND = Not Detected. Results reported on dry-weight basis.
Terpene Profile
| Terpene | Concentration | Result (%) | mg/g | Aroma Note |
|---|---|---|---|---|
| Myrcene | 0.820 | 8.20 | Earthy, mango | |
| Caryophyllene | 0.420 | 4.20 | Spicy, peppery | |
| Linalool | 0.260 | 2.60 | Lavender, sweet | |
| Terpinolene | 0.260 | 2.60 | Floral, herbal | |
| Valencene | 0.090 | 0.90 | Sweet orange | |
| Total Terpenes | 1.85 | 18.50 | Earthy, mango |
Safety & Contaminant Screen
Pesticides & Plant Growth Regulators
66-analyte panel · LC-MS/MS & GC-MS/MS
Heavy Metals
Pb, Cd, As, Hg · ICP-MS
Microbial Impurities
Salmonella, STEC, Aspergillus spp. · qPCR
Mycotoxins
Aflatoxins B1, B2, G1, G2 · Ochratoxin A · LC-MS/MS
Residual Solvents
Cat I & II solvents · GC-MS Headspace
Foreign Matter
Visual + microscopic inspection
Filth & Foreign Materials
Insect frag., mammalian excreta, hair, mold
Water Activity & Moisture
aw meter · oven loss-on-drying
Quality Metrics
Moisture Content
10.7%
Water Activity (aw)
0.54
Density (g/mL)
0.40
Phenotype Consistency & Stabilization Line
Phenotype Consistency
The values reported on this Certificate reflect the top-performing phenotype(SK-Pheno #1) selected from a 11-plant cohort of the RKS Star Killer S1 line. Across three production cycles, individual plants from this seed line have fallen within a 10–15% variation envelope on total cannabinoids and total terpene yield when grown under comparable indoor conditions.
Note: phenotype expression is subject to environmental conditions (light, nutrients, VPD, training). These figures are not a guarantee of grow outcome.
Stabilization Status
S1 FEMINIZEDThis line has been stabilized through successive inbred generations with phenotype-driven selection. Trait-locking criteria for the SK-Pheno #1 selection:
- Resin-dominant (myrcene > 0.55%)
- Heavy body-effect uniformity
- Compact node spacing ≤ 6 cm
- Cold-tolerant under nighttime drops (15°C)
- Bud density ≥ 0.40 g/mL
- Cohort flower variance ≤ 5 days
Expected Grow Outcomes
Flower Time
8 – 10
weeks
Yield (Indoor)
444–588
g / m²
Yield (Outdoor)
444–638
g / plant
Plant Height
74–118
cm indoor
Difficulty
Easy
beginner+
Reference outcomes are based on RKS breeding-room conditions: 600–900 PPFD, VPD 1.0–1.4 kPa, mineral-fed coco substrate, 18/6 veg · 12/12 flower. Outcomes will vary with cultivator skill, environment, and phenotype selection.
Analytical Methods
HPLC-DAD
Cannabinoid potency by reverse-phase HPLC with diode array detection. SOP-CAN-101 Rev 4.
GC-FID Headspace
Terpene quantification · 38-analyte target list. SOP-TER-204 Rev 2.
LC-MS/MS & GC-MS/MS
Pesticide and mycotoxin screening with QuEChERS prep. SOP-PES-310 Rev 5.
ICP-MS
Heavy metals (Pb, Cd, As, Hg) digested via microwave HNO₃. SOP-MET-115 Rev 3.
qPCR Microbiology
PathoSEEK® assay for Salmonella, STEC, and Aspergillus. SOP-MIC-401 Rev 2.
GC-MS Headspace (Solvents)
Cat I & II residual solvents per USP <467>. SOP-RSV-220 Rev 3.
Laboratory Authorization
Dr. Priya Raman
Dr. Priya Raman, Ph.D.
Lead Analyst · Cannabinoid & Terpene Chemistry
Dr. Camille Boucher
Dr. Camille Boucher
Laboratory Director · ISO 17025 Approving Officer
Disclaimer of variation · Results published in this Certificate represent a selected phenotype of the RKS Star Killer S1 stabilized line under controlled indoor conditions. Individual seedlings may produce plants that vary by approximately 10–15% on total cannabinoids and terpene output, and may express alternate phenotypes within the line. Final cannabinoid and terpene expression is subject to cultivator inputs — lighting, substrate, nutrient regime, environment, and training technique. This document is intended as a reference benchmark of the genetic potential of the RKS Star Killer line, not as a guarantee of any individual plant’s outcome.
Note for seed buyers · This Certificate analyzes mature, cured flower from a selected reference plant cultivated by the RKS breeding team under controlled conditions. Seed-grown plants may vary slightly from the tested phenotype depending on environment, nutrient regime, and grower input. For best expression of the SK-Pheno #1 profile, follow the cultivation reference outlined in the “Expected Grow Outcomes” section above.
Note for seed buyers · This Certificate analyzes mature, cured flower from a selected reference plant cultivated by the RKS breeding team under controlled conditions. Seed-grown plants may vary slightly from the tested phenotype depending on environment, nutrient regime, and grower input. For best expression of the SK-Pheno #1 profile, follow the cultivation reference outlined in the “Expected Grow Outcomes” section above.