Product Name
Zkittlez Feminized
RKS GENETICS
SC LABS
Independent Third-Party Verification Lab
2440 Industrial Pkwy West · Hayward, CA 94545
Tel: (510) 555-2240 · lab@cannalytics-coa.com
License #: C8-0000091-LIC
CERTIFICATE OF ANALYSIS
· GENETICS PROFILE ·
DOC ID: CAN-2026-04-Z-0871
Lab verify
cannalytics·coa
cannalytics·coa
RKS genetics
royalkingseeds.us
royalkingseeds.us
CORE LINEGeneration:S1 FEMINIZED·Line:RKS House Cut
Phenotype:Z-Pheno #4 (Cookies-Profile)
Client / Brand
Royal King Seeds Ltd.
Strain Genetics
Hybrid Cross (41/59)
Sample ID
RKS-Z-FEM-0871
Batch / Lot Number
Z-2026-0871
Production Date
2026-03-02
Date Received
2026-04-12
Date of Analysis
2026-04-20 — 2026-04-25
RKS Stabilized Line
S1 · Trait-Locked
Verified Genetics
ISO 17025 Co-Signed
Breeder-Selected Phenotype
Z-Pheno #4 of 12
RKS BREEDER NOTES
Batch No. Z-2026-0871 · Core Line · Cycle 50
From the RKS Breeding Floor
The Zkittlez line has been stabilized through successive inbred generations with phenotype-driven selection. The hybrid character — predictable balance, terpene complexity, manageable structure — has been our breeding objective from cycle one. The phenotype reported here is the top-performing selection from our most recent twelve-plant cohort; the variation envelope on the report shows the realistic spread you can expect from seeds in this line. The line traces to a Sunset Sherbet × Wedding Cake cross, with each generation selected to fix the traits that define Zkittlez.
Breeding Objective · Z-Pheno #4
- Stabilize potency floor at the lower bound of the THC band
- Tighten cohort variation to ≤ 12% on total cannabinoids
- Preserve aromatic identity across generations
- Maintain trichome density ≥ 28% across cohort
D. Van Royen
Master Breeder · Royal King Seeds
Genetics verified by RKS Breeding Team
Genetics verified by RKS Breeding Team
Total THC
25.6%
Total CBD
0.29%
Total Terpenes
1.90%
Safety
ALL PASS
Cannabinoid Profile
| Analyte | Distribution | Result (%) | mg/g | LOQ |
|---|---|---|---|---|
| THCa | 28.16 | 281.6 | 0.05 | |
| Δ9-THC | 0.90 | 9.0 | 0.05 | |
| CBDa | 0.28 | 2.8 | 0.05 | |
| CBD | 0.04 | 0.4 | 0.05 | |
| CBG | 1.17 | 11.7 | 0.05 | |
| CBC | 0.48 | 4.8 | 0.05 | |
| CBN | 0.09 | 0.9 | 0.05 | |
| Total THC ((THCa × 0.877) + Δ9-THC) | 25.6 | 256.0 | — |
LOQ = Limit of Quantitation. ND = Not Detected. Results reported on dry-weight basis.
Terpene Profile
| Terpene | Concentration | Result (%) | mg/g | Aroma Note |
|---|---|---|---|---|
| Myrcene | 0.610 | 6.10 | Earthy, mango | |
| Limonene | 0.570 | 5.70 | Citrus, lemon | |
| Caryophyllene | 0.410 | 4.10 | Spicy, peppery | |
| Bisabolol | 0.190 | 1.90 | Chamomile, honey | |
| Camphene | 0.120 | 1.20 | Damp woodland | |
| Total Terpenes | 1.90 | 19.00 | 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
12.4%
Water Activity (aw)
0.61
Density (g/mL)
0.43
Phenotype Consistency & Stabilization Line
Phenotype Consistency
The values reported on this Certificate reflect the top-performing phenotype(Z-Pheno #4) selected from a 12-plant cohort of the RKS Zkittlez 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 Z-Pheno #4 selection:
- Cookies-family aroma fidelity
- Caryophyllene > 0.35%
- Trait stability across 3 production cycles
- Bud density 0.38–0.45 g/mL
- Mid-night-temperature tolerance
- Cohort flower variance ≤ 6 days
Expected Grow Outcomes
Flower Time
7 – 9
weeks
Yield (Indoor)
425–600
g / m²
Yield (Outdoor)
575–750
g / plant
Plant Height
105–160
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. Helena Park
Dr. Helena Park, Ph.D.
Senior Analyst · Cannabinoid Quantification
Robert Castaneda
Robert Castaneda
Laboratory Director · ISO 17025 Approving Officer
Disclaimer of variation · Results published in this Certificate represent a selected phenotype of the RKS Zkittlez 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 Zkittlez 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 Z-Pheno #4 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 Z-Pheno #4 profile, follow the cultivation reference outlined in the “Expected Grow Outcomes” section above.