LSD cannabis seeds packaging — Royal King Seeds UK
HybridAuto
THC 23%
😊 Beginner Pick
HybridAutoflowerIn Stock

LSD Auto

AutoflowerSee Lab Report →

LSD Auto cannabis seeds for UK growers. Hybrid · 23% THC · euphoric, creative, focused. Discreet UK delivery, priced in GBP.

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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 2026-09-15 on 275 seeds.

Germination rate: 96.4% (n=275)
Last QC test date: 2026-09-15
Indoor yield: 478-596 g/m² (avg across 14 verified grower reports)
Outdoor yield: 512-794 g/plant (avg across 5 verified grower reports)

About LSD Auto

Will LSD finish outdoors in Britain? Yes, within the April to October season. The balanced genetics cope with what British weather does from one week to the next, from damp air on the west coast to the drier run of counties in the east. Flowering runs 65-70 days seed to harvest, which puts harvest in September or October for most of the country.

What yield is realistic? 550-650 gr/m2 indoors is achievable with competent LED lighting and attention to feeding. Outdoors, 280-350 gr/plant is realistic in 50 litre pots or in prepared ground with full sun — and "full sun" is doing a lot of work in that sentence at these latitudes, so the position you pick in the garden matters more than the pot you buy. At 23% THC with a limonene-forward profile, the return on the effort is sound.

Is it forgiving? Reasonably. Anyone comfortable with pH, a feed schedule and a light timer will get a good result. It will not hold your hand, but it will not punish one missed watering either.

Further questions we get asked about LSD

Which medium? For flavour, peat-free soil cut with about 30% perlite and amended slowly — fish, blood and bone, rock phosphate, seaweed meal, all of it available at any British garden centre. For weight, coco with fertigation at EC 1.4-1.8 through bloom. This hybrid performs in both; the choice is about what you want out of it.

How does it handle a British summer? Well enough, on hybrid vigour. Keep the root zone under 28°C with mulch or pale pots, and do not transplant into a heatwave. The more common British problem is the opposite one: a cold, wet July that never lets the plant dry out between waterings.

When do I switch to bloom feed? Inside the first week of visible pistils. The 49/51 balance shifts its demand quickly at the transition — phosphorus and potassium up, nitrogen down. Soil growers can top-dress with guano and sulphate of potash; coco and hydro should move to a low-nitrogen bloom formula straight away.

Indoors or outdoors? Both work, for different reasons. Indoors you own the flowering environment completely. Outdoors, across the April to October season, the plant gets a light intensity no domestic LED matches and can reach 280-350 gr/plant — at the price of accepting whatever the autumn does. Flowering: 65-70 days seed to harvest. Indoor yield: 550-650 gr/m2. Outdoor yield: 280-350 gr/plant. Plant height: 80-100 cm. Rated intermediate difficulty.

Flavour, aroma and effect

LSD arrives in stages. The first draw at 23% THC brings a bright citrus edge that lifts off the palate immediately. The euphoric, creative, focused, calm character follows within minutes, as a head and body effect at once. The mind stays clear while the muscles let go by degrees, which is what makes it adaptable — a small dose carries an afternoon, a larger one turns into an evening. The caryophyllene underneath adds a warmth that keeps the whole thing anchored.

Terpene breakdown

Primary: Limonene · Secondary: Caryophyllene · Tertiary: Linalool. These three build an aroma that keeps moving through the cure. Fresh off the dry it leads with limonene; after three or four weeks sealed in glass at 16-18°C the linalool underneath comes up and the whole thing gains a layer. Vaporising between 180°C and 195°C catches the widest span of them, since the lighter linalool molecules are the first thing heat destroys.

Who it suits

Who does well with LSD? 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

🤗Euphoric
74% of people reported feeling Euphoric
🤩Creative
70% of people reported feeling Creative
🧠Focused
62% of people reported feeling Focused
🧘Calm
53% of people reported feeling Calm
😌Relaxed
45% of people reported feeling Relaxed
😊Happy
38% of people reported feeling Happy
😎Uplifted
31% of people reported feeling Uplifted
🤤Hungry
27% of people reported feeling Hungry
😴Sleepy
24% of people reported feeling Sleepy

Strain Type

Indica 49%Sativa 51%

Strain Data Sheet

🧬THC23% - 26% (High)
🌿LineageMazar-I-Sharif × Skunk #1
🔬TypeAutoflower Hybrid
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Height80-100 cm
⚖️YieldTypical for type
🏠Yield Indoor550-650 gr/m2
🌳Yield Outdoor280-350 gr/plant
⏱Flowering Time65-70 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
LSD Auto
royalkingseeds.co.uk
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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LSD 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

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

Breeding Goal

Reach auto trigger and finish-window uniformity for the LSD pack.

Selection Focus

Chosen for terpene profile, vigour, structure and finish-time consistency.

Pollen / Mother Source

Royal King Genetics in-house mother stock — pollen taken from a sibling male drawn from the same selected pheno population.

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