Grom 99 by Zoolander Seeds
Grom 99, from breeder Zoolander Seeds, is an indica-leaning strain descended from Grape Romulan × Cinderella 99. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Grom 99 grows against.
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Similar strains
| Breeder | Zoolander Seeds |
|---|---|
| Type | indica/sativa |
| Flowering time | ±63 days |
| Environment | Outdoors, Greenhouse |
| Lineage | Grape Romulan × Cinderella 99 |
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🧬 Explore the family: Grape Romulan · Cinderella 99
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Growing Grom 99: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Grape Romulan or Cinderella 99 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.
Grom 99 FAQ
How long does Grom 99 take to flower?
Grom 99 typically flowers in around 63 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.
Is Grom 99 an indica or a sativa?
Grom 99 is listed as indica/sativa.
What are the parents of Grom 99?
Grom 99 was bred from Grape Romulan × Cinderella 99 by Zoolander Seeds.
What environment does Grom 99 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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