
Haze XL Feminised
Grow Haze XL Feminised in Ireland. Indica genetics testing at 17% THC. Known for euphoric, creative effects. Ships discreetly nationwide with sourced grow figures.
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 2026-09-10 on 175 seeds at 21-24°C.
About Haze XL Feminised
Everything about Haze XL at harvest follows from one decision, which is when you stop. The figures are 400-600 g/m2 indoors and 600 g/plant outdoors, with resin filling towards 17% THC. Weight arrives late on a plant this indica-leaning — the 67/33 split stacks calyxes hard through the middle weeks and then thickens them. Growers who cut on the calendar rather than the glass lose that last stage, and it is the most valuable one.
Where the weight is won
Three parts of the 8-10 weeks of bloom account for most of the difference between a good result and an average one on a plant rated 400-600 g/m2 indoors and 600 g/plant outdoors.
The stretch, days 1-10 after the flip. Canopy height set here decides how evenly light lands for the rest of the run. Twenty to thirty per cent is typical; taking the lowest fans around day seven pushes energy up to the sites that will finish.
Weeks three to five. Caryophyllene production climbs through this stretch and responds to a 6-8°C gap between lights-on and lights-off. Outdoors an Irish September provides that without help; indoors it has to be built, at roughly 25°C by day and 18-20°C at night. Bloom feed goes potassium-forward around EC 1.6-1.8.
The final fortnight. Feeding stops, plain pH-corrected water goes on, and the loupe comes out daily. Fifteen to twenty per cent amber suits the weight of effect this one is grown for. Outdoors, that falls between late September and mid-October, and the forecast gets a say.
Flowering: 8-10 weeks. Indoor yield: 400-600 g/m2. Outdoor yield: 600 g/plant. Plant height: Small (0-120 cm). Rated easy difficulty.
Flavour, aroma and effect
Haze XL arrives in order. The first draw at 17% THC gives peppercorn heat that lands at the back of the throat. The euphoric, creative character follows in minutes, as weight behind the eyes that works down through the shoulders. By a quarter of an hour it reads as physical stillness rather than sedation — a strong disinclination to stand up. Two to three hours at a sensible dose. Myrcene underneath contributes depth beneath the rest.
Terpene breakdown
Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. This is a combination that turns up repeatedly in cultivars people rate, and it is usually what gets commented on when a jar is opened for the first time after a proper cure. Caryophyllene anchors it, myrcene holds the middle, and bisabolol sits behind both — the last of those being what separates this from other strains leading on the same terpene.
Who it suits
Who does well with Haze XL? Indoor growers who want to choose their own timeline. Tunnel growers who want to decide when flowering starts rather than letting August decide it. Anyone with the space to veg it properly first. Rated easy, which means a moderate learning curve that rewards attention without needing specialist kit.
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Haze XL 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.
A heritage cultivar that we have taken through five rounds of inbred selection. The recent-era reference profile — terpene fingerprint, finishing window, plant frame — has been welded into the population. Every seed in the pack carries the trait set that put Haze XL on the map.
Bring the original Haze XL reference profile back to true-to-type seed stock.
Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.