
Sour Diesel Feminised
Sour Diesel Feminised — sativa cannabis seeds suited to UK growing conditions. 24% THC with happy, energetic, creative effects. Fast, discreet UK delivery.
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 2026-09-17 on 400 seeds.
About Sour Diesel Feminised
Cured properly and opened cold, Sour Diesel leads with terpinolene: a restless herbal note of rosemary and cold apple skin, with a thread of something floral that moves as you breathe in. Underneath it limonene adds a bright edge that keeps the nose from turning heavy, and it reads mid-palate rather than on the first pass. This 11/89 sativa tests at 24% THC, but potency is the least interesting number here: what separates Sour Diesel from the others on the same shelf is how the aroma behaves across a cure, and that is a question of storage and patience rather than genetics alone.
Growing it for the nose rather than the scales
Chasing terpene expression in Sour Diesel pulls against chasing yield, and it is worth knowing which one you are doing before you start. The Terpinolene/Limonene/Ocimene profile does its best work in living soil, where the microbial side produces secondary compounds a bottle cannot. That is easier here than it sounds: decent peat-free compost and worm castings are a garden centre purchase in most British towns.
Through the 70-75 days of bloom, stop foliar spraying after week two — anything landing on developing trichomes is still there at harvest and you will taste it. The final three weeks decide which terpenes dominate the cured flower: nights held at 16-18°C push terpinolene forward, while a warmer finish protects the lighter ocimene notes at the top.
The cure is where most of the flavour is lost in this country, and the reason is the weather. A 10-14 day hang wants 15-18°C at 55-60% relative humidity, which a British autumn will not give you in a spare room — a temperature-controlled cupboard or a wine fridge set to 16°C solves it for the price of one wasted harvest. Then into glass, burped twice a day for the first fortnight. The limonene layer that makes this one worth growing does not appear until somewhere between weeks three and four in the jar.
Flowering: 70-75 days. Indoor yield: 600-700 g/m2. Outdoor yield: 1500-2000 g/plant. Plant height: 100-120 cm. Rated intermediate difficulty.
What Sour Diesel is actually like
Growers report happy, energetic, creative as the defining characteristics and our own notes agree. At 24% 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 Terpinolene/Limonene pairing leaves a finish that keeps changing across a session.
Best suited to creative work, company, getting outdoors, and daytime use generally.
Terpene breakdown
Primary: Terpinolene · Secondary: Limonene · Tertiary: Ocimene. These three build an aroma that keeps moving through the cure. Fresh off the dry it leads with terpinolene; after three or four weeks sealed in glass at 16-18°C the ocimene underneath comes up and the whole thing gains a layer. Vaporising between 180°C and 195°C catches the widest span of them, since the lighter ocimene molecules are the first thing heat destroys.
Who it suits
Sour Diesel 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. Photoperiod genetics leave plant size and harvest date under your control — veg longer for bigger plants, or flip early when space is short. The April to October season accommodates a bloom of 70-75 days comfortably for outdoor growers across the country.
Effects
Strain Type
Strain Data Sheet
Packaging
Feminised Premium
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Sour Diesel Feminised — 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 inbred selection on the original late-1990s legacy Sour Diesel cuts. We were not chasing a redesign — we locked the long-flowering uniformity that earned this cultivar its reputation. Whatever the next pack throws is what the last pack threw.
Strip out pheno drift while preserving the heritage long-flowering uniformity.
Chosen for terpene saturation, sativa vigour and a workable finish time despite long-flowering genetics.
Royal King Genetics in-house mother stock — pollen taken from a sibling male drawn from the same selected pheno population.