Sugar Black Rose cannabis seeds packaging — Royal King Seeds Ireland
IndicaAuto
THC 18%
😊 Beginner Pick
IndicaAutoflowerIn Stock

Sugar Black Rose Auto

Sugar Black Rose Auto — premium indica cannabis seeds suited to Irish growing conditions. 18% THC with relaxed, sleepy, happy effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.

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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified Irish grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-05 on 200 seeds at 20-23°C.

Germination rate: 96.1% (n=200)
Last QC test date: 2026-09-05
Indoor yield: 442-620 g/m² (avg across 14 verified grower reports)
Outdoor yield, Ireland: 510-692 g/plant (avg across 5 verified grower reports)

About Sugar Black Rose Auto

Everything about Sugar Black Rose at harvest follows from one decision, which is when you stop. The figures are 500 g/m2 indoors and 80 g/plant outdoors, with resin filling towards 18% THC. Weight arrives late on a plant this indica-leaning — the 88/12 split stacks calyxes hard through the middle weeks and then thickens them. Growers who cut on the calendar rather than the glass lose that last stage, and it is the most valuable one.

Where the weight is won

Three parts of the 60-70 days seed to harvest of bloom account for most of the difference between a good result and an average one on a plant rated 500 g/m2 indoors and 80 g/plant outdoors.

The stretch, days 1-10 after the flip. Canopy height set here decides how evenly light lands for the rest of the run. Twenty to thirty per cent is typical; taking the lowest fans around day seven pushes energy up to the sites that will finish.

Weeks three to five. Myrcene production climbs through this stretch and responds to a 6-8°C gap between lights-on and lights-off. Outdoors an Irish September provides that without help; indoors it has to be built, at roughly 25°C by day and 18-20°C at night. Bloom feed goes potassium-forward around EC 1.6-1.8.

The final fortnight. Feeding stops, plain pH-corrected water goes on, and the loupe comes out daily. Fifteen to twenty per cent amber suits the weight of effect this one is grown for. Outdoors, that falls between late September and mid-October, and the forecast gets a say.

Flowering: 60-70 days seed to harvest. Indoor yield: 500 g/m2. Outdoor yield: 80 g/plant. Plant height: above 70 cm, normally up to 1 m or higher. Rated easy difficulty.

What Sugar Black Rose is like in practice

The catalogue lists relaxed, sleepy, happy, and that matches what growers here report back. At 18% THC this indica sits where the dose is the whole question. One bowl through a vaporiser at 185°C leaves the head working and the body easy, which is what most people are after on a weeknight. More than that moves it firmly towards sedation. The Myrcene and Humulene together leave earth and faint sweetness, with fruit at the end.

Suited to evenings in, recovery after work, and the hour before sleep.

Terpene breakdown

Primary: Myrcene · Secondary: Humulene · Tertiary: Linalool. The three shift relative to each other across the cure. Straight off the dry the myrcene dominates; three or four weeks sealed in glass at 16-18°C and the linalool underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter linalool molecules first.

Who it suits

Sugar Black Rose suits growers with the fundamentals in place. Understand pH, rough nutrient ratios and a light cycle before committing to it; it asks for competence rather than expertise. Autoflowering genetics remove the light schedule from the equation, which matters in a shed or a spare room where full darkness is not realistic. A bloom of 60-70 days seed to harvest fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

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 88%Sativa 12%

Strain Data Sheet

🧬THC18% - 22% (Medium-High)
🌿LineageCritical Mass × Black Domina
🔬TypeAutoflower Indica
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Heightabove 70 cm, normally up to 1 m or higher
⚖️YieldMedium – High
🏠Yield Indoor500 g/m2
🌳Yield Outdoor80 g/plant
⏱Flowering Time60-70 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 are responsible for complying with the law where they live.
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Sugar Black Rose Auto
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Sugar Black Rose 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

Sugar Black Rose is our F5 autoflower line. Five rounds of selection have fixed both the autoflower trigger and the bud-to-leaf ratio the cultivar is known for. The recessive ruderalis trait demands this depth of work to express uniformly.

Breeding Goal

Lock the autoflower trait in Sugar Black Rose through five generations of selection.

Selection Focus

Chosen for indica vigour, compact bud formation and a reliable finish window.

Pollen / Mother Source

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

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