Diesel Duff cannabis seeds packaging — Royal King Seeds Ireland
Sativa
THC 17%
🎨 Creative
SativaFeminisedIn Stock

Diesel Duff Feminised

Order Diesel Duff Feminised seeds online in Ireland. A quality sativa cultivar at 17% THC delivering happy, energetic, creative. Chosen for a short season and a damp finish. Fast shipping and a germination guarantee.

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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 2026-09-07 on 375 seeds at 20-23°C.

Germination rate: 97.9% (n=375)
Last QC test date: 2026-09-07
Indoor yield: 368-528 g/m² (avg across 8 verified grower reports)
Outdoor yield, Ireland: 512-696 g/plant (avg across 7 verified grower reports)

About Diesel Duff Feminised

Days 1-14, germination and early veg. Diesel Duff generally cracks within about two days on damp kitchen paper and is above the medium by day three. The first fortnight came in quick and reaching, narrow leaves angled up from the start. Five nodes by day 14 with real space between them, which tells you what is coming after the flip. Keep the humidity near 70% and damping off stops being a concern.

Weeks 3-6, veg. It wanted to climb. Low-stress training from week three was not enough on its own, so the main stem went over at a right angle in week four and the secondaries levelled up behind it.

Bloom, weeks 1-10. The 21/79 character came through clearly. Limonene was noticeable by week three and kept building; resin was obvious without a loupe from about week five. Indoor yield: up to 450 g/m2. Height: Medium (150-245 cm). Tested at 17%. Rated moderate.

The rest of the run

Weeks 4-6, mid-bloom. Loose clusters from week three closed up into defined colas. Buds kept extending rather than thickening, stacking calyxes along the stems. The lower sites did better than expected, because an open plant lets light reach places a bushy one shades out.

Ripening, weeks 8-10. Plain water for the last ten days. Limonene was strong enough by then that carbon filtration was not optional in a terraced house. Heads went clear to milky over the final fortnight, amber showing on sugar leaves first, and around 15% amber on the calyxes is a defensible place to stop.

Drying and curing. Hung whole in the dark at 17°C and 58% humidity for twelve days, both held by a dehumidifier because an October room here will hold neither. Stems snapped instead of bending, which is the only test worth trusting. Four weeks in glass after that. The up to 450 g/m2 figure held up. Terpinolene was far more present after the cure than at harvest — the cure makes flavour, it does not merely preserve it.

Flowering: 60-70 days. Indoor yield: up to 450 g/m2. Outdoor yield: up to 450 g/plant. Plant height: Medium (150-245 cm). Rated moderate difficulty. Feminised seeds.

What Diesel Duff is like in practice

The catalogue lists happy, energetic, creative, and that matches what growers here report back. At 17% THC this sativa sits where there is a usable window rather than a cliff. At 175-185°C the first effect is lift and mental energy, which suits company, a long walk, or work that benefits from it. The body stays light, so it is a genuine daytime option for anyone with a tolerance. The Limonene and Terpinolene together leave a clean citrus finish that clears quickly.

Suited to company, creative work, and getting out of the house.

Terpene breakdown

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

Who it suits

Diesel Duff 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. Photoperiod genetics leave plant size and harvest date under your control — veg longer for a bigger plant, or flip early when the ceiling is low. A bloom of 60-70 days fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

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

Best For

✦ Daytime
✦ Creative Projects
✦ Social Activities

Strain Type

Indica 21%Sativa 79%

Strain Data Sheet

🧬THC17% - 21% (Medium-High)
🌿LineageSativa-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Sativa
🌡ClimateWarm / Mediterranean, long season
📅HarvestSept – Nov, S. hemisphere (typical)
📏HeightMedium (150-245 cm)
⚖️YieldMedium – High
🏠Yield Indoorup to 450 g/m2
🌳Yield Outdoorup to 450 g/plant
⏱Flowering Time60-70 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
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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Diesel Duff Feminised
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🛡️Aluminium interior lining
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Diesel Duff Feminised — 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
F4
Generations
4+
Breeding Programme
Filial Stabilisation (F4) — four-generation selection
Stabilisation Notes — What This Means for Your Grow

A 2010s production cross stabilised over four generations of selection. Diesel Duff grows true-to-type with the sativa vigour that defines the cultivar.

Breeding Goal

Cull off-type phenos in Diesel Duff through filial selection.

Selection Focus

Chosen for trichome density, sativa branching architecture and an energising terpene expression.

Pollen / Mother Source

Royal King Genetics elite-cut archive — pollen from a maintained S1 line of the original elite mother.

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