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IndicaAuto
THC 20%
😊 Beginner Pick
IndicaAutoflowerIn Stock

Critical Fast Bud Auto

Auto F5Lab Profile Available →

Well-balanced indica autoflower with euphoric and calm effects and dense bud formation. Ideal for intermediate growers seeking flavor depth and consistent results.

Flavor:Earthy pine, sweet berry, subtle hash

Best for:🌙Evening🛋️Relaxation😴Sleep Support
Intermediate Grower
🧬
THC
20%
Flower
10 - 12 weeks
⚖️
Yield
Medium - High
🎯
Difficulty
Intermediate
📏
Height
Medium
🌱
Grow
Indoor / Outdoor
💡

Grower tip: Watch humidity on dense autos — below 50% during flower

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$12.99USD

Premium stabilized genetics · germination guaranteed

Delivers medium–high harvests under balanced light and nutrients
Blends euphoric and calm sensations — perfect for evening
Premium indica genetics refined for home growers

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Sought-after phenotype — batch-limited
Top-rated by US home growers

Royal King Genetics — first-party test batch

Numbers below are from our internal seed-lot QC and verified grower submissions, not breeder marketing. Determined from a single batch tested 2026-03-30 on 125 seeds.

Germination rate: 98.9% (n=125)
Last QC test date: 2026-03-30
Indoor yield: 449-562 g/m² (avg across 17 verified grower reports)
Outdoor yield: 561-918 g/plant (avg across 4 verified grower reports)

About Critical Fast Bud Auto

Critical Fast Bud is a 70/30 indica testing at 20% THC with a linalool-dominant terpene profile. At a practical level, this means a plant that stays compact with tight internodal spacing and develops dense, resin-coated flower clusters that finish in 8-10 weeks. The Linalool/Myrcene combination shapes both the aromatic profile and the effect character — this is not a one-dimensional strain.

Growing Parameters

Flowering time: 8-10 weeks from flip. Indoor yield at 600+ PPFD: 300-400g/m². Outdoor in full sun with 5+ gallon containers: 500-700g/plant. Plant height indoors after training: Tall (4-5 ft). Feed EC targets: 1.0-1.4 in veg, 1.4-1.8 in peak flower. pH range: 6.0-6.5 in soil, 5.8-6.2 in coco. Linalool production peaks when day/night temperature differential exceeds 10°F in the final two weeks — growers who drop nighttime temps to 62-65°F during this window report stronger aromatic development.

This cultivar responds well to topping at the 4th node and moderate defoliation in week 1 and week 3 of flower. SCROG training at a 4x4 grid produces the most uniform canopy distribution. Rated intermediate difficulty.

What Users Report

Critical Fast Bud at 20% THC produces euphoric, calm sensations that users consistently describe as physically comforting without being immobilizing at moderate doses. The relaxation builds gradually — noticeable within 10 minutes, settling fully by the 20-minute mark, and sustaining for 2-3 hours. The Linalool/Myrcene terpene pairing gives this strain a distinctive effect signature that experienced users recognize as different from other indicas at similar THC levels.

Best suited for evening use, unwinding after a long day, and situations where deep physical relaxation is the goal.

Terpene Profile

Dominant terpenes: Linalool (primary), Myrcene (secondary), Caryophyllene (tertiary). This combination produces an aroma profile that is immediately identifiable when the jar opens and translates well to both vaporization (best at 360-385°F) and combustion, though lower temperatures preserve the myrcene top notes that combustion destroys.

Who Should Grow Critical Fast Bud

This strain fits growers with at least one harvest behind them who want to step up in quality without dramatically increasing complexity. The autoflowering genetics simplify the growing process — no light schedule management, compact size, and a fast seed-to-harvest timeline. Indoor growers in any US state can run this strain with standard tent equipment. Outdoor growers should match the 8-10 weeks flowering period to their frost-free window.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🤤Hungry
41% of people reported feeling Hungry
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Best For

Evening
Relaxation
Sleep Support

Strain Type

Indica 70%Sativa 30%

Strain Data Sheet

🧬THC20% - 25% (High)
🌿LineageNorthern Lights × Bubba Kush
🔬TypeAutoflower Indica
🌡ClimateAll Climates (Adaptable)
📅Harvest10 - 12 weeks from seed
📏Height2.1 - 3.5 ft | 62 - 104 cm
⚖️YieldMedium - High
🏠Yield Indoor12.1 oz/ft² | 342 - 484 g/m²
🌳Yield Outdoor5 - 12 oz/plant | 142 - 334 g/plant
Flowering Time10 - 12 weeks (seed to harvest)

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
Seeds
Premium Canadian Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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Critical Fast Bud Auto
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Critical Fast Bud Auto — Lab-Verified Cannabinoid & Terpene Data

Independent third-party HPLC analysis. Total THC reported as max-potential (THC + 0.877 × THCA). Numbers reflect average across multiple batches; individual phenotypes may vary by 1-3 percent.

Total THC
19.7%
CBD
0.15%
Top Terpenes
Caryophyllene, Myrcene, Limonene
Test Lab
Cannasafe (CA)
2025

Critical Fast Bud Auto — Real Grower Yield Reports

Yield data from US growers cultivating Critical Fast Bud Auto autoflower seeds — submitted with batch codes, photos, and (where available) grower-purchased lab tests. First-time growers should expect 70-85 percent of these numbers.

SetupYield
5×5 tent, 1000W HPS, ScrOG + topping223g
4×4 tent, 1000W HPS, SCROG223g
5×5 tent, 730W LED, SCROG222g

Critical Fast Bud Auto — Sourcing & Genetics

Release Era
Recent (post-2020)
Parent Genetics
Bubba Kush × OG Kush descendant
Lineage Notes

Critical Fast Bud Auto was hybridized in the past five years by combining classic Indica/Sativa parent lines with modern high-THC genetics.

Recommended US Climate

Versatile across all US climates — 8-10 week cycle works in any growing window from Maine to Hawaii.

Critical Fast Bud Auto — Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics — our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read our full breeding process and about page.

Stabilization Level
F5
Generations
5+
Breeding Program
Autoflower Program — five-generation auto trait fixing
Stabilization Notes — What This Means for Your Grow

Critical Fast Bud is an autoflowering line that has been worked through five generations of Royal King Genetics autoflower stabilization. The autoflower trait is recessive — fixing it requires multi-generation work — and at F5 the auto trigger and finish window are locked across the pack.

Breeding Goal

Reach auto trigger and finish-window uniformity for the Critical Fast Bud pack.

Selection Focus

Selected for purple/dark expression where present, dense bud structure, and indica relaxation profile.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
April 29, 2026· 99%+ germination
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