🌱
IndicaAuto
THC 17%
😊 Beginner Pick
IndicaAutoflowerIn Stock

Kush XL Auto

Auto F4Lab Profile Available →

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

Flavor:Hash, pine nut, creamy earth

Best for:🌙Evening🛋️Relaxation😴Sleep Support
Intermediate Grower
🧬
THC
17%
Flower
9 - 11 weeks
⚖️
Yield
Medium - High
🎯
Difficulty
Intermediate
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

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

Select Pack Size
$14.49USD

Premium stabilized genetics · germination guaranteed

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

Ready to grow this strain?

1
Thousands of successful grows with this strain
🎁

Free Seeds With Every Order

Spend $30+
1 Free
Spend $75+
5 Free
Best
Spend $200+
15 Free

Choose your free strains — no mystery seeds. Learn more

🇺🇸Free Shipping
🌱Germination Guarantee
🔒Discreet Packaging
Premium genetics — sells out fast
Top-rated by US home growers

About Kush XL Auto

The genetic expression of Kush XL — a 68/32 indica — varies meaningfully across phenotypes. Most seeds from this line produce the dominant phenotype: a compact, bushy plant with broad fan leaves and golf-ball-dense flowers that pack on weight in the final two weeks. But expect variation — roughly 1 in 4 plants will lean slightly more toward the sativa parent, showing more stretch and airier flower structure. THC testing at 17% across phenotypes, with Myrcene consistently dominant.

Genetic Expression in the Grow Room

The dominant phenotype — which appears in roughly 70-75% of seeds — produces a compact, symmetrical plant with broad internodes and heavy lateral branching. Fan leaves are wide and dark green, typical of the indica heritage. Flower clusters form tight, round colas that pack on weight noticeably in the final 10 days before harvest.

The minority phenotype leans the other direction and may surprise growers expecting uniformity. Flowering completes in 8-10 weeks across phenotypes. Yield: 350-450g/m² indoor, 500-700g/plant outdoor. Height: Tall (4-5 ft). Rated intermediate — the phenotype variation adds a layer of interest without adding significant difficulty. Growing from regular seeds with autoflowering genetics.

What Users Report

Kush XL at 17% THC produces relaxed, sleepy, happy 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 Myrcene/Humulene 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: Myrcene (primary), Humulene (secondary), Linalool (tertiary). This combination produces a flavor that rewards patience in the cure — the terpene complexity at week 4 in jars is substantially more interesting than the flat, one-note character of a rushed one-week cure.

Who Should Grow Kush XL

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

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😊Happy
58% of people reported feeling Happy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿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 68%Sativa 32%

Strain Data Sheet

🧬THC17% - 21% (Medium-High)
🌿LineageMaster Kush × Bubba Kush
🔬TypeAutoflower Indica
🌡ClimateAll Climates (Adaptable)
📅Harvest9 - 11 weeks from seed
📏Height2.9 - 5.2 ft | 88 - 156 cm
⚖️YieldMedium - High
🏠Yield Indoor13.0 oz/ft² | 368 - 486 g/m²
🌳Yield Outdoor5 - 13 oz/plant | 138 - 356 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.
1
Kush XL Auto
royalkingseeds.us
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

Related Strains

Apollo 13 cannabis seeds packaging — Royal King Seeds USA
Sativa
THC 25%
High Potency

Apollo 13 Feminized

HappyEnergeticCreative
$13.99USD
Peyote Gorilla cannabis seeds packaging — Royal King Seeds USA
Indica
THC 19%
🎨 Creative

Peyote Gorilla Feminized

CreativeCalm
$10.99USD
🌱
IndicaAuto
THC 16%
😊 Beginner Pick

Purple Sage Auto

CreativeFocusedCalm
$10.99USD
Blue Fruit cannabis seeds packaging — Royal King Seeds USA
Indica
THC 14%
🌙 Sleep Aid

Blue Fruit Feminized

RelaxedSleepyHappy
$10.99USD

Kush XL 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
16.5%
CBD
0.07%
Top Terpenes
Myrcene, Humulene, Pinene
Test Lab
Cannasafe (CA)
2025

Kush XL Auto — Real Grower Yield Reports

Yield data from US growers cultivating Kush XL 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
Outdoor, balcony, 5-gal fabric pot270g
5×5 tent, 730W LED, SCROG166g
4×4 tent, 1000W HPS, SCROG166g

Kush XL Auto — Sourcing & Genetics

Release Era
Late 2000s
Parent Genetics
Northern Lights × Kush modern indica
Lineage Notes

Kush XL Auto comes from a respected West Coast breeder line known for its terpene-forward genetics and stable phenotype expression.

Recommended US Climate

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

Kush XL 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
Royal King Genetics Auto Line — recessive trait stabilization
Stabilization Notes — What This Means for Your Grow

Kush XL is our F5 autoflower line. Five generations of selection have fixed both the autoflower trigger and the purple expression the cultivar is known for. The recessive ruderalis trait requires this depth of work to express uniformly.

Breeding Goal

Lock the autoflower trait in Kush XL through five generations of selection.

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
June 27, 2025· 99%+ germination
RK

Royal King Seeds AI

Strain expert & grow advisor

🌱

How can I help?

I can recommend strains, give growing tips, compare products, and add items to your cart.

AI can recommend strains, compare products & add to cart