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

Sweet ZZ Auto

AutoflowerSee Lab Report →

Sweet ZZ Auto cannabis seeds for UK growers. Indica · 20% THC · creative, focused, calm. Discreet UK delivery, priced in GBP.

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£10.18
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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 2026-09-19 on 400 seeds.

Germination rate: 96.2% (n=400)
Last QC test date: 2026-09-19
Indoor yield: 484-634 g/m² (avg across 16 verified grower reports)
Outdoor yield: 560-820 g/plant (avg across 7 verified grower reports)

About Sweet ZZ Auto

Read Sweet ZZ backwards from the harvest: 350-400 g/m2 under lights, 90-175 g/plant outdoors, with resin filling out towards 20% THC. Most of the final weight lands between weeks five and eight, when the 85/15 genetics stack calyxes quickly and the trichome cover goes from scattered to solid. Outdoors you want that stage falling in late August and early September while the light is still long, so count back to it from the first frost your own area usually sees rather than from a date on a packet.

Getting the weight out of this plant

Three stretches of the 65-75 days seed to harvest of bloom decide whether you reach the top of this strain's range (350-400 g/m2 indoors, 90-175 g/plant outdoors). The rest is maintenance.

The first ten days of flower. What the plant does during the stretch sets canopy height, and canopy height sets how evenly the light lands. Expect 20-30%, which is manageable; stripping the lowest fans around day seven sends the energy up to the sites that will actually finish.

Weeks three to five. Caryophyllene production climbs through here, and it responds to a day-night temperature gap of 6-8°C. British autumn nights hand that to outdoor growers for free from September; indoors you have to build it, at roughly 25-26°C lights-on and 18-20°C lights-off. Bloom feed goes potassium-heavy around EC 1.6-1.8.

The last ten to fourteen days. Stop feeding and run pH-corrected water. Check trichomes daily under a 60x loupe — cut at 15-20% amber for the weight of effect this genetics is bought for. Outdoors that lands between late September and mid-October across most of Britain, and the weather forecast should get a vote.

Flowering: 65-75 days seed to harvest. Indoor yield: 350-400 g/m2. Outdoor yield: 90-175 g/plant. Plant height: 70-120 cm. Rated intermediate difficulty.

Flavour, aroma and effect

Sweet ZZ arrives in stages. The first draw at 20% THC brings dry pepper that registers at the back of the throat. The creative, focused, calm 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 Sweet ZZ? 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

🤩Creative
77% of people reported feeling Creative
🧠Focused
69% of people reported feeling Focused
🧘Calm
60% of people reported feeling Calm
😌Relaxed
51% of people reported feeling Relaxed
😴Sleepy
52% of people reported feeling Sleepy
😊Happy
38% of people reported feeling Happy
🤤Hungry
34% of people reported feeling Hungry
🤗Euphoric
26% of people reported feeling Euphoric
🌿Stress Relief
13% of people reported feeling Stress Relief

Strain Type

Indica 85%Sativa 15%

Strain Data Sheet

🧬THC20% - 25% (High)
🌿LineageGrape Ape × Grapefruit
🔬TypeAutoflower Indica
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Height70-120 cm
⚖️YieldMedium – High
🏠Yield Indoor350-400 g/m2
🌳Yield Outdoor90-175 g/plant
⏱Flowering Time65-75 days seed to harvest

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable United Kingdom legislation.
1
Sweet ZZ Auto
royalkingseeds.co.uk
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Sweet ZZ 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
Autoflower Programme — five-generation auto trait fixing
Stabilisation Notes — What This Means for Your Grow

Five generations of Royal King Genetics autoflower stabilisation on Sweet ZZ. Auto trigger time, finish window and tight finish window all run uniform — no photo-hybrid surprises in the pack.

Breeding Goal

Stabilise the recessive ruderalis trait in Sweet ZZ for uniform auto-trigger.

Selection Focus

Chosen for trichome coverage, stout structure and consistent flowering time across the pack.

Pollen / Mother Source

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

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