
Jelly Roll Auto
Jelly Roll Auto — premium indica cannabis seeds suited to Irish growing conditions. 16% THC with relaxed, euphoric, creative effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.
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 2026-09-17 on 325 seeds at 20-23°C.
About Jelly Roll Auto
Does Jelly Roll finish outdoors in Ireland? It does, planted out at the end of May and cut by early October. A compact 72/28 plant is easier to shelter and easier to hide, though the density that makes it worth growing is also what holds water after rain. Bloom takes 55-65 days, so the harvest date is set by the calendar far more than by your technique.
What should I expect to take off it? up to 200 g/m2 indoors and up to 250 g/plant outdoors are the published figures, and both assume a full light or a full season plus a root run to match. A tunnel gets you most of the way to the outdoor number; a windowsill will not. At 16% THC the effort is well spent either way.
Is it a sensible first grow? Reasonably. Anyone who has finished one grow will manage this one; it asks for consistency rather than expertise.
Other questions that come up about Jelly Roll
Soil or coco? Coco with fertigation at EC 1.4-1.8 through bloom if you are there daily and want speed. Peat-free soil with slow amendments — fish, blood and bone, seaweed meal, rock phosphate — if you are not, and want flavour. Both suit this indica; the deciding factor is your week, not the plant.
How does it handle the weather here? The dense canopy shades itself, which is useful on the handful of genuinely warm days and a liability in a wet week. Mulch the root zone, water early, and keep air moving underneath.
When does bloom feed start? Within a week of the first pistils. The 72/28 balance shifts demand quickly at the transition — phosphorus and potassium up, nitrogen down. Soil growers top-dress; coco and hydro switch formula immediately.
Tunnel, outdoors or indoors? A tunnel is the best value of the three here. Indoors you own the 55-65 days of bloom completely; outdoors the plant gets light no lamp matches and can reach up to 250 g/plant, and pays for it in rain. Flowering: 55-65 days. Indoor yield: up to 200 g/m2. Outdoor yield: up to 250 g/plant. Plant height: 90-120 cm. Medium. Rated easy difficulty.
What Jelly Roll is like in practice
The catalogue lists relaxed, euphoric, creative, focused, and that matches what growers here report back. At 16% 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
Jelly Roll 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 55-65 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.
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Jelly Roll 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.
Five generations of Royal King Genetics autoflower stabilisation on Jelly Roll. Auto trigger time, finish window and tight finish window all run uniform — no photo-hybrid surprises in the pack.
Lock the autoflower trait in Jelly Roll through five generations of selection.
Chosen for indica vigour, compact bud formation and a reliable finish window.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.