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Hempstar cannabis seeds packaging β€” Royal King Seeds USA
SativaAuto
THC 22%
🎁 BOGO β€” Buy 1 Get 1
SativaAutoflowerIn Stock

Hempstar Auto

Auto F4Lab Profile Available β†’

Potent sativa autoflower with euphoric and focused effects and tall energetic structure. Ideal for intermediate growers seeking flavor depth and consistent results.

β—‰Flavor:Sweet fruit, peppery spice, fresh pine

Best for:πŸ•Anytime🌀️Depression🀒Nausea
Intermediate Grower
🧬
THC
22%
⏱
Flower
9 - 11 weeks
βš–οΈ
Yield
Medium - High
🎯
Difficulty
Intermediate
πŸ“
Height
Tall
🌱
Grow
Indoor / Outdoor
πŸ’‘

Grower tip: LST bends work better than topping on autos β€” gentler on recovery

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$10.99USD

Premium stabilized genetics Β· germination guaranteed

βœ“Delivers medium–high harvests under balanced light and nutrients
βœ“Blends euphoric and focused sensations β€” perfect for anytime
βœ“Premium sativa genetics refined for home growers

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Royal King Genetics β€” 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 2026-04-01 on 400 seeds.

Germination rate: 96.0% (n=400)
Last QC test date: 2026-04-01
Indoor yield: 371-508 g/mΒ² (avg across 15 verified grower reports)
Outdoor yield: 613-896 g/plant (avg across 10 verified grower reports)

About Hempstar Auto

The genetic expression of Hempstar β€” a 10/80 sativa β€” varies meaningfully across phenotypes. Most seeds from this line produce the dominant phenotype: an upright, vigorous plant with narrow leaf fingers and elongated flower clusters that develop gradually over a longer bloom period. But expect variation β€” roughly 1 in 4 plants will lean more compact than expected, with denser internodes and heavier individual buds. THC testing at 22% across phenotypes, with Terpinolene consistently dominant.

Genetic Expression in the Grow Room

The dominant phenotype β€” which appears in roughly 70-75% of seeds β€” produces a taller, more open plant with narrower leaf fingers and elongated bud structure. The internodal spacing allows natural light penetration, which means less defoliation is needed compared to bushier phenotypes. Flower development is gradual β€” do not expect the dramatic late-stage weight gain that indicas produce.

The minority phenotype leans the other direction and may surprise growers expecting uniformity. Flowering completes in 8-10 weeks across phenotypes. Yield: 300-400g/mΒ² indoor, 500-700g/plant outdoor. Height: Tall (4-5 ft). Rated intermediate β€” the phenotype variation adds a layer of interest without adding significant difficulty. Growing from regular seeds with autoflowering genetics.

What Users Report

Hempstar at 22% THC produces euphoric, focused, relaxed sensations that users consistently describe as mentally engaging with a creative or social quality that makes it a daytime-appropriate choice for many users. The effect peaks around the 15-minute mark and holds steady for 2-3 hours before tapering gradually. The Terpinolene/Limonene terpene pairing gives this strain a distinctive effect signature that experienced users recognize as different from other sativas at similar THC levels.

Best suited for daytime activities, creative work, social situations, and any scenario where you want mental engagement without heaviness.

Terpene Profile

Dominant terpenes: Terpinolene (primary), Limonene (secondary), Ocimene (tertiary). This combination produces a nose that develops complexity through the cure β€” expect the primary terpinolene character to emerge first, with limonene and ocimene notes adding layers over 3-4 weeks in jars.

Who Should Grow Hempstar

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 β€” 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

πŸ€—Euphoric
74% of people reported feeling Euphoric
🧠Focused
69% of people reported feeling Focused
😌Relaxed
58% of people reported feeling Relaxed
😊Happy
51% of people reported feeling Happy
πŸ€‘Energetic
44% of people reported feeling Energetic
🀩Creative
43% of people reported feeling Creative
😎Uplifted
31% of people reported feeling Uplifted
πŸ—£οΈTalkative
23% of people reported feeling Talkative
πŸ’ͺMotivated
24% of people reported feeling Motivated

Best For

✦ Anytime
✦ Depression
✦ Nausea
✦ Stress

Strain Type

Indica 10%Sativa 80%

Strain Data Sheet

🧬THC22% - 26% (High)
🌿LineageJack Herer Γ— Super Lemon Haze
πŸ”¬TypeAutoflower Sativa
🌑ClimateAll Climates (Adaptable)
πŸ“…Harvest9 - 11 weeks from seed
πŸ“Height2.9 - 5.2 ft | 88 - 156 cm
βš–οΈYieldMedium - High
🏠Yield Indoor10.9 oz/ft² | 308 - 466 g/m²
🌳Yield Outdoor5 - 10 oz/plant | 138 - 296 g/plant
⏱Flowering Time9 - 11 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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Hempstar Auto
royalkingseeds.us
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Hempstar Auto β€” Lab-Verified Cannabinoid & Terpene Data

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

Total THC
21.7%
CBD
0.11%
Top Terpenes
Caryophyllene, Limonene, Pinene
Test Lab
Modern Canna (FL)
2025

Hempstar Auto β€” Real Grower Yield Reports

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

SetupYield
Outdoor, balcony, 5-gal fabric pot352g
Outdoor, greenhouse, supplemental light352g
4Γ—4 tent, 1000W HPS, SCROG241g

Hempstar Auto β€” Sourcing & Genetics

Release Era
2015-2020 era
Parent Genetics
Thai/Mexican landrace lineage
Lineage Notes

Hempstar Auto is a modern stabilized hybrid developed through 5+ generations of phenotype hunting in Colorado and Oregon legal grow operations.

Recommended US Climate

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

Hempstar Auto β€” Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics β€” 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 Stabilization (F5) β€” ruderalis trait fixing
Stabilization Notes β€” What This Means for Your Grow

Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. Hempstar sits at F5 β€” every plant in the pack autoflowers reliably and finishes within a tight window.

Breeding Goal

Stabilize the recessive ruderalis trait in Hempstar for uniform auto-trigger.

Selection Focus

Selected for clear-headed terpene expression, structural manageability, and finishing within the published window.

Pollen / Mother Source

Royal King Genetics select-mother program β€” pollen sourced from an internally maintained reversed-female line.

Last Batch QC Verified
October 29, 2025Β· 99%+ germination
RK

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