Blue 16 by Grandiflora Genetics
Growers reach for Blue 16 as a hybrid option, a cross of Project 4516 × Unknown Strain out of Grandiflora Genetics. 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 Blue 16 grows against.
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Similar strains
| Breeder | Grandiflora Genetics |
|---|---|
| Flowering time | ±60 days |
| Environment | Outdoors |
| Lineage | Project 4516 × Unknown Strain |
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🧬 Explore the family: Project 4516 · Unknown Strain
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Growing Blue 16: what to expect
As a hybrid, expect a moderate stretch after the flip (around 100%) — but watch the plant, not the label: phenotypes within Blue 16 can lean either direction. Growers familiar with Project 4516 or Unknown Strain 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.
Blue 16 FAQ
How long does Blue 16 take to flower?
Blue 16 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 Blue 16 an indica or a sativa?
The breeder doesn't specify — treat it as a hybrid and read the plant.
What are the parents of Blue 16?
Blue 16 was bred from Project 4516 × Unknown Strain by Grandiflora Genetics.
What environment does Blue 16 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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