Silverback Gorilla cannabis seeds packaging — Royal King Seeds UK
IndicaAuto
THC 20%
😊 Beginner Pick
IndicaAutoflowerIn Stock

Silverback Gorilla Auto

AutoflowerSee Lab Report →

Grow Silverback Gorilla Auto in the UK. Indica genetics at 20% THC, known for relaxed, sleepy, happy effects.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified UK grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-18 on 475 seeds.

Germination rate: 98.4% (n=475)
Last QC test date: 2026-09-18
Indoor yield: 472-636 g/m² (avg across 12 verified grower reports)
Outdoor yield: 612-828 g/plant (avg across 3 verified grower reports)

About Silverback Gorilla Auto

Cured properly and opened cold, Silverback Gorilla leads with caryophyllene: dry black pepper that catches at the back of the throat, clove and warm wood underneath it. Underneath it myrcene adds depth and weight low down in the profile, and it reads mid-palate rather than on the first pass. This 74/26 indica tests at 20% THC, but potency is the least interesting number here: what separates Silverback Gorilla from the others on the same shelf is how the aroma behaves across a cure, and that is a question of storage and patience rather than genetics alone.

Growing it for the nose rather than the scales

Chasing terpene expression in Silverback Gorilla pulls against chasing yield, and it is worth knowing which one you are doing before you start. The Caryophyllene/Myrcene/Bisabolol profile does its best work in living soil, where the microbial side produces secondary compounds a bottle cannot. That is easier here than it sounds: decent peat-free compost and worm castings are a garden centre purchase in most British towns.

Through the 50-60 days of bloom, stop foliar spraying after week two — anything landing on developing trichomes is still there at harvest and you will taste it. The final three weeks decide which terpenes dominate the cured flower: nights held at 16-18°C push caryophyllene forward, while a warmer finish protects the lighter bisabolol notes at the top.

The cure is where most of the flavour is lost in this country, and the reason is the weather. A 10-14 day hang wants 15-18°C at 55-60% relative humidity, which a British autumn will not give you in a spare room — a temperature-controlled cupboard or a wine fridge set to 16°C solves it for the price of one wasted harvest. Then into glass, burped twice a day for the first fortnight. The myrcene layer that makes this one worth growing does not appear until somewhere between weeks three and four in the jar.

Flowering: 50-60 days. Indoor yield: up to 300 g/m2. Outdoor yield: up to 300 g/plant. Rated intermediate difficulty.

Flavour, aroma and effect

Silverback Gorilla arrives in stages. The first draw at 20% THC brings dry pepper that registers at the back of the throat. The relaxed, sleepy, happy character follows within minutes, starting as weight behind the eyes and working down through the shoulders and chest. By about a quarter of an hour it has become a physical stillness — not sedation so much as a strong disinclination to get up. Two to three hours at a moderate dose. The myrcene underneath adds body and depth beneath the rest.

Terpene breakdown

Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. This combination turns up often in cultivars that win things, and it is usually the one growers comment on when a jar is opened for the first time after curing. Caryophyllene anchors the aroma, myrcene occupies the middle, and bisabolol sits behind both — which is the part that separates this strain from others sharing its primary terpene.

Who it suits

Who does well with Silverback Gorilla? Balcony growers in flats from Brighton to Glasgow. Anyone wanting one quick outdoor crop rather than a long project. Indoor growers short of headroom. The autoflowering genetics run on their own clock, so there is no light schedule to manage, no anxiety about light leaks, and harvest comes 10-12 weeks from germination whatever the season is doing. Difficulty is rated intermediate, which means a moderate learning curve that rewards attention without demanding a laboratory.

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

Strain Type

Indica 74%Sativa 26%

Strain Data Sheet

🧬THC20% - 24% (High)
🌿LineageGrape Ape × Super Silver Haze
🔬TypeAutoflower Indica
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Height60 – 100 cm (typical)
⚖️YieldMedium
🏠Yield Indoorup to 300 g/m2
🌳Yield Outdoorup to 300 g/plant
⏱Flowering Time50-60 days

Packaging

Resealable +
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Royal King Seeds
Autoflowering
Regular
Seeds
Premium Genetics
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Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable United Kingdom legislation.
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Silverback Gorilla Auto
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Silverback Gorilla Auto — Breeder Information

Royal King Genetics

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

Stabilisation Level
F5
Generations
5+
Breeding Programme
Royal King Genetics Auto Line — recessive trait stabilisation
Stabilisation Notes — What This Means for Your Grow

Silverback Gorilla is our F5 autoflower line. Five rounds of selection have fixed both the autoflower trigger and the purple expression the cultivar is known for. The recessive ruderalis trait demands this depth of work to express uniformly.

Breeding Goal

Stabilise the recessive ruderalis trait in Silverback Gorilla for uniform auto-trigger.

Selection Focus

Chosen for resin output, a low-slung stature and a clean indica terpene fingerprint.

Pollen / Mother Source

Royal King Genetics elite-cut archive — pollen from a maintained S1 line of the original elite mother.

Last Batch QC Verified
22 September 2026· 99%+ germination