
American Haze Auto
Grow American Haze Auto in Ireland. Sativa genetics testing at 24% THC. Known for creative, energetic 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 2026-09-22 on 175 seeds at 21-24°C.
About American Haze Auto
Everything about American Haze at harvest follows from one decision, which is when you stop. The figures are 300–500 g/m² indoors and 350–450 g/plant outdoors, with resin filling towards 24% THC. A 16/84 plant lays its weight down gradually instead of in a rush, so there is no single fattening window to aim at. The temptation in an Irish September is to cut early because the forecast looks poor; that costs more than the weather would have.
Where the weight is won
Three parts of the 7–9 weeks from seed of bloom account for most of the difference between a good result and an average one on a plant rated 300–500 g/m² indoors and 350–450 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. Half again on top of veg height is normal. Supercrop anything that breaks the line inside the first week, or you spend the remaining weeks lighting one branch properly.
Weeks three to five. Pinene 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. Five to ten per cent amber keeps the clarity intact. Outdoors, that falls between late September and mid-October, and the forecast gets a say.
Flowering: 7–9 weeks from seed. Indoor yield: 300–500 g/m². Outdoor yield: 350–450 g/plant. Plant height: 120–160 cm. Rated intermediate difficulty.
Flavour, aroma and effect
American Haze arrives in order. The first draw at 24% THC gives resin and green wood, clean rather than sweet. The creative, energetic character follows in minutes, as attention sharpening. Colour and sound both read busier, and conversation goes further afield than it otherwise would. It holds two to three hours without a spike. Limonene underneath contributes a lift that stops it going heavy.
Terpene breakdown
Primary: Pinene · Secondary: Limonene · Tertiary: Caryophyllene. Temperature decides how much of this profile survives. Low vaporisation at 180-188°C keeps limonene and caryophyllene audible over the pinene; run it hotter, or burn it, and all three collapse into one note that is pleasant enough and tells you nothing.
Who it suits
Who does well with American Haze? Back-garden and balcony growers in Dublin, Cork and Galway. Anyone who wants a crop dry and put away before the autumn closes in. Indoor growers short of headroom. The autoflowering genetics run to their own clock, so there is no schedule to manage and no anxiety about light leaks. Rated intermediate, which means a moderate learning curve that rewards attention without needing specialist kit.
Effects
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Strain Data Sheet
Packaging
Regular
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American Haze 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.
Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. American Haze sits at F5 — every plant in the pack autoflowers reliably and finishes inside a tight window.
Stabilise the recessive ruderalis trait in American Haze for uniform auto-trigger.
Chosen for sativa vigour, bud-to-leaf ratio and the distinctive terpene character of the original cut.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.