Ultra Grapefruit by Ultra Genetics
Ultra Grapefruit, from breeder Ultra Genetics, is a sativa-leaning strain descended from Grapefruit. Indoors it typically finishes flowering in around 60 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Ultra Grapefruit grows against.
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Similar strains
| Breeder | Ultra Genetics |
|---|---|
| Type | mostly sativa |
| Flowering time | ±60 days |
| Environment | Outdoors, Greenhouse |
| Lineage | Grapefruit |
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Ancestry Pedigree
Clone Only Strains
Original Strains
Growing Ultra Grapefruit: what to expect
As a sativa-leaning plant, plan for a big stretch after the flip (often 100–200%) — flip earlier than feels natural and keep training options ready. Sativa-leaning plants also generally prefer a lighter feed than heavy indicas. Growers familiar with Grapefruit 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.
Ultra Grapefruit FAQ
How long does Ultra Grapefruit take to flower?
Ultra Grapefruit typically flowers in around 60 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Ultra Grapefruit an indica or a sativa?
Ultra Grapefruit is listed as mostly sativa.
What are the parents of Ultra Grapefruit?
Ultra Grapefruit was bred from Grapefruit by Ultra Genetics.
What environment does Ultra Grapefruit 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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