
Sugar Black Rose Auto
Sugar Black Rose Auto — premium indica cannabis seeds suited to Australian growing conditions. 18% THC with relaxed, sleepy, happy effects. Discreet delivery across Australia. Germination guaranteed.
Royal King Genetics — first-party test batch
Figures below are from our internal seed-lot QC and verified Australian grower submissions, not breeder marketing. Determined from a single batch tested 2026-04-11 on 375 seeds.
About Sugar Black Rose Auto
Here is what Sugar Black Rose actually delivers at harvest: 350-450g/m² per square metre indoors, 600-800g/plant per plant outdoors in Australian conditions, with resin production peaking at 18% THC across tested samples. Those numbers tell a story when you work backwards through the 8-10 weeks flowering window. The bulk of your final weight accumulates during weeks 5 through 8 — a period where the 88/12 genetics stack calyxes rapidly and trichome coverage shifts from scattered to frosted. Southern Hemisphere outdoor growers targeting a late-March harvest should calculate their flip date (or natural light trigger) accordingly, aiming for buds to enter this critical fattening stage during February when Australian daylight hours are still generous.
Maximising Your Harvest
To reach the upper end of yield potential (350-450g/m² indoors, 600-800g/plant outdoors), focus your efforts on three critical windows during the 8-10 weeks flowering period.
Window 1: The first 10 days after flowering begins. Stretch management determines canopy uniformity, which directly impacts light distribution and final yield. Expect modest stretch of 20-30% — a quick defoliation of lower fan leaves at day 7 redirects energy to developing bud sites.
Window 2: Weeks 3-5 of bloom. Myrcene terpene biosynthesis ramps up during this period. Maintain a day/night temperature differential of at least 6-8°C to encourage terpene accumulation — Australian autumn evenings (March-April) naturally provide this swing for outdoor growers. Indoor cultivators should target 25-26°C during lights-on and 18-20°C during lights-off. Supplement with potassium-heavy bloom nutrients at EC 1.6-1.8.
Window 3: Final 10-14 days before harvest. Cease all nutrient input and flush with pH-adjusted water. Monitor trichomes daily with a 60x jeweller's loupe — harvest at 15-20% amber for the full-bodied effect this genetics is known for. Southern Hemisphere outdoor growers: this window typically falls in late March through mid-April.
Plant height: Medium (90-120cm). Difficulty: intermediate.
What to Expect When Using Sugar Black Rose
Australian users report relaxed, sleepy, happy as the defining characteristics, and our experience aligns with that consensus. At 18% THC, this indica sits in a potency bracket where dosage control genuinely matters. A single bowl in a vaporiser at 185°C produces a manageable, pleasant body relaxation with intact mental function — perfect for winding down after a long day in the Australian sun. Increasing the dose shifts the experience firmly towards physical sedation, and many users find this their preferred nighttime cultivar during the cooler months. The Myrcene/Humulene terpene combination imparts a flavour that lingers on the palate — earthy and slightly sweet with a fruit-like finish.
Ideal settings: quiet evenings, film nights, post-exercise recovery, and sleep preparation.
Terpene Breakdown
Primary: Myrcene · Secondary: Humulene · Tertiary: Linalool. Together these three compounds construct an aromatic signature that evolves throughout the curing process. Freshly dried flower leads with myrcene presence, but after three to four weeks in sealed glass jars at 16-18°C, the linalool undertone strengthens and the overall bouquet develops a layered complexity. Vaporisation between 180°C and 195°C captures the broadest spectrum of these terpenes — higher temperatures degrade the more volatile linalool molecules first.
Suitability and Recommendations
Sugar Black Rose suits growers with fundamental skills already established. You should understand pH management, basic nutrient ratios, and light cycle requirements before committing to this cultivar — it will not hold your hand, but it will not punish minor mistakes harshly either. Autoflowering genetics eliminate the need for light cycle manipulation, making this ideal for Australian balcony growers, guerrilla setups, and anyone wanting a fast turnaround from seed to harvest. The Australian growing season (October through April) accommodates the 8-10 weeks bloom period comfortably for outdoor cultivators in all states. Shipped discreetly throughout Australia with our germination guarantee.
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Sugar Black Rose Auto — Breeder Information
Royal King GeneticsBred 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.
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.
Lock the autoflower trait in Sugar Black Rose through five generations of selection.
Chosen for indica vigour, compact bud formation and a reliable finish window.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.