Damnesia cannabis seeds packaging — Royal King Seeds UK
SativaAuto
THC 16%
😊 Beginner Pick
SativaAutoflowerIn Stock

Damnesia Auto

AutoflowerSee Lab Report →

Damnesia Auto — sativa cannabis seeds suited to UK growing conditions. 16% THC with happy, energetic, creative effects. Fast, discreet UK delivery.

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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 125 seeds.

Germination rate: 96.8% (n=125)
Last QC test date: 2026-09-19
Indoor yield: 369-514 g/m² (avg across 9 verified grower reports)
Outdoor yield: 635-936 g/plant (avg across 8 verified grower reports)

About Damnesia Auto

Read Damnesia backwards from the harvest: up to 0.6 g/watt (dry, with 1000W HPS) under lights, 70-80 g/plant outdoors, with resin filling out towards 16% THC. This 16/84 cultivar spreads its weight gain across the whole of bloom instead of front-loading it the way a quick indica does. Cutting early out of nerves about the weather is the most expensive mistake made with plants of this shape. In Britain that means holding through late September and into October depending on your latitude, because the limonene-led profile only fills out in the closing fortnight.

Getting the weight out of this plant

Three stretches of the 7 weeks flowering (approx 9 weeks seed to harvest) of bloom decide whether you reach the top of this strain's range (up to 0.6 g/watt (dry, with 1000W HPS) indoors, 70-80 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. It can add half again its height. Supercrop anything that breaks the line of the canopy inside the first week or you will spend the rest of bloom lighting one branch properly and five badly.

Weeks three to five. Limonene 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 5-10% amber to keep the clear, lifted character intact. Outdoors that lands between late September and mid-October across most of Britain, and the weather forecast should get a vote.

Flowering: 7 weeks flowering (approx 9 weeks seed to harvest). Indoor yield: up to 0.6 g/watt (dry, with 1000W HPS). Outdoor yield: 70-80 g/plant. Plant height: 80-120 cm. Rated intermediate difficulty.

What Damnesia is actually like

Growers report happy, energetic, creative as the defining characteristics and our own notes agree. At 16% THC this sativa sits where most people find a workable window. Vaporised at 175-185°C the first effect is lift and mental energy, suited to work that benefits from it, a long walk, or an afternoon with company. The body stays light throughout, which makes it a genuine daytime option for anyone with a tolerance. The Limonene/Terpinolene pairing leaves a clean citrus finish that clears quickly.

Best suited to creative work, company, getting outdoors, and daytime use generally.

Terpene breakdown

Primary: Limonene · Secondary: Terpinolene · Tertiary: Pinene. 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. Limonene anchors the aroma, terpinolene occupies the middle, and pinene sits behind both — which is the part that separates this strain from others sharing its primary terpene.

Who it suits

Damnesia suits growers with the basics in place. Understand pH, rough nutrient ratios and light cycles before you commit to it; it asks for competence rather than expertise. Autoflowering genetics take the light cycle out of the equation, which suits balcony growers, anyone working around British daylight hours, and anyone who wants the whole thing over quickly. The April to October season accommodates a bloom of 7 weeks flowering (approx 9 weeks seed to harvest) comfortably for outdoor growers across the country.

Effects

😊Happy
72% of people reported feeling Happy
🤑Energetic
64% of people reported feeling Energetic
🤩Creative
63% of people reported feeling Creative
😎Uplifted
51% of people reported feeling Uplifted
🤗Euphoric
47% of people reported feeling Euphoric
🧠Focused
42% of people reported feeling Focused
🗣️Talkative
30% of people reported feeling Talkative
💪Motivated
31% of people reported feeling Motivated
😆Giggly
24% of people reported feeling Giggly

Strain Type

Indica 16%Sativa 84%

Strain Data Sheet

🧬THC16% - 20% (Medium-High)
🌿LineageAMS × Amnesia Haze
🔬TypeAutoflower Sativa
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Height80-120 cm
⚖️YieldTypical for type
🏠Yield Indoorup to 0.6 g/watt (dry, with 1000W HPS)
🌳Yield Outdoor70-80 g/plant
⏱Flowering Time7 weeks flowering (approx 9 weeks 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.
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Damnesia 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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Damnesia 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 Stabilisation (F5) — ruderalis trait fixing
Stabilisation Notes — What This Means for Your Grow

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

Breeding Goal

Lock the autoflower trait in Damnesia through five generations of selection.

Selection Focus

Chosen for sativa vigour, bud-to-leaf ratio and the distinctive terpene character of the original cut.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

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