Grapefruit Auto by Lineage Genetics
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Grapefruit Auto lands on the autoflowering side of the spectrum, Lineage Genetics's take on the Grapefruitmatic line. Indoors it typically finishes flowering in around 63 days from sprout. Reported THC is 19% with CBD at 0.89%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Grapefruit Auto grows against.
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Similar strains
| Breeder | Lineage Genetics |
|---|---|
| Type | 40% Indica, 60% Sativa |
| Flowering time | ±63 days |
| THC | 19% |
| CBD | 0.89% |
| Environment | Outdoors |
| Lineage | Grapefruitmatic |
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Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.
Ancestry Pedigree
Fast Buds Company
Clone Only Strains
Original Strains
Original Strains
Growing Grapefruit Auto: what to expect
Because Grapefruit Auto is an autoflower it runs on age, not photoperiod: keep it under 18–20 hours of light from sprout to harvest, start in its final pot, and go easy on training after week 3 — autos never pause to recover. Growers familiar with Grapefruitmatic will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
Grapefruit Auto FAQ
How long does Grapefruit Auto take to flower?
Grapefruit Auto typically flowers in around 63 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Grapefruit Auto an indica or a sativa?
Grapefruit Auto is listed as 40% Indica, 60% Sativa (autoflowering).
What are the parents of Grapefruit Auto?
Grapefruit Auto was bred from Grapefruitmatic by Lineage Genetics.
How strong is Grapefruit Auto?
Reported THC for Grapefruit Auto is 19% and CBD 0.89%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Grapefruit Auto like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
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