Ultimate Thai by Hemcy Genetics

Ultimate Thai strain photo
Type 75%sativa / 25%indicaFlower ±70 daysTHC 22%Cross Mostly Sativa

Ultimate Thai, from breeder Hemcy Genetics, is an indica-leaning strain descended from Mostly Sativa. Indoors it typically finishes flowering in around 70 days after the flip to 12/12. Reported THC is 22%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Ultimate Thai grows against.

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BreederHemcy Genetics
Type75%sativa / 25%indica
Flowering time±70 days
THC22%
EnvironmentOutdoors, Greenhouse
LineageMostly Sativa

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🧬 Explore the family: Mostly Sativa

Ancestry Pedigree

Growing Ultimate Thai: 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 Mostly Sativa 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.

Ultimate Thai FAQ

How long does Ultimate Thai take to flower?

Ultimate Thai typically flowers in around 70 days after switching to a 12/12 light schedule. Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Ultimate Thai an indica or a sativa?

Ultimate Thai is listed as 75%sativa / 25%indica.

What are the parents of Ultimate Thai?

Ultimate Thai was bred from Mostly Sativa by Hemcy Genetics.

How strong is Ultimate Thai?

Reported THC for Ultimate Thai is 22%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.

What environment does Ultimate Thai 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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Facts compiled from public breeder listings. Growing Ultimate Thai? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

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Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.