
Haze XL Auto
Haze XL Auto cannabis seeds for UK growers. Indica · 17% THC · euphoric, creative. Discreet UK delivery, priced in GBP.
About Haze XL Auto
Here is what Haze XL delivers at harvest: 650 g/m2 per square metre indoors, 400-600 g/plant per plant outdoors in UK conditions, with resin production peaking at 17% THC. Those numbers tell a story when you work backwards through the its flowering window. The bulk of your final weight accumulates during weeks 5 through 8 — a period where the 67/33 genetics stack calyxes rapidly and trichome coverage shifts from scattered to frosted. UK outdoor growers targeting an early-October harvest should count back from their local first-frost date accordingly, aiming for buds to enter this critical fattening stage through late August and early September while daylight is still generous.
Maximising Your Harvest
To reach the upper end of this strain's yield potential (650 g/m2 indoors, 400-600 g/plant outdoors), focus your efforts on three critical windows during the its 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. Caryophyllene terpene biosynthesis ramps up during this period. Maintain a day/night temperature differential of at least 6-8°C to encourage terpene accumulation — UK autumn evenings (September-October) 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. UK outdoor growers: this window typically falls from late September through mid-October.
Indoor yield: 650 g/m2. Outdoor yield: 400-600 g/plant. Plant height: 100 cm. Rated intermediate difficulty.
Flavour, Aroma, and Experience
The sensory arc of Haze XL unfolds in stages. Initial inhalation at 17% THC brings a warm peppery spice that tingles at the back of the throat. The euphoric, creative effects emerge within minutes, beginning as a pleasant heaviness behind the eyes that migrates downward through the shoulders, chest, and limbs. By the fifteen-minute mark, a deep physical stillness sets in — not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The myrcene secondary terpene adds a distinct layer: additional body depth that reinforces the physical dimension.
Terpene Breakdown
Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. This particular terpene trio appears frequently in award-winning cultivars and produces a nose that most UK growers find immediately appealing when jars are first opened after curing. The caryophyllene dominance anchors the aroma, myrcene provides mid-range character, and bisabolol contributes a subtle background note that distinguishes this strain from others sharing the same primary terpene.
Suitability and Recommendations
Who grows Haze XL successfully? Balcony growers in flats from Brighton to Glasgow. Regional cultivators wanting a quick-turnaround outdoor crop. Indoor growers with limited headroom in small tents. The autoflowering genetics run on their own internal clock — no light schedule adjustments, no stress about light leaks, and harvest arrives 10-12 weeks after germination regardless of the season. Difficulty is rated intermediate, meaning a moderate learning curve that rewards attention without demanding laboratory-grade conditions. Delivered UK-wide in discreet, unbranded packaging with germination guarantee included.
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Haze XL 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.
Haze XL is an autoflowering line that has been progressed through five rounds of Royal King Genetics autoflower stabilisation. The autoflower trait is recessive — fixing it takes multi-generation work — and at F5 the auto trigger and finish window are welded across the pack.
Lock the autoflower trait in Haze XL 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.