Isis by Dutch Passion
Bred by Dutch Passion from Mostly Sativa, Isis is a sativa-leaning cannabis variety. Indoors it typically finishes flowering in around 63 days after the flip to 12/12. Reported THC is 15%. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Isis grows against.
🌿 Start a Isis journal — free →
Similar strains
| Breeder | Dutch Passion |
|---|---|
| Type | mostly sativa |
| Flowering time | ±63 days |
| THC | 15% |
| Environment | Indoors |
| Lineage | Mostly Sativa |
| Descendants | Delta 9, StarRyder, PolarLight, Dolce Vita |
🌱 Get Isis seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Mostly Sativa · Delta 9 · StarRyder · PolarLight · Dolce Vita
Ancestry Pedigree
Original Strains
Growing Isis: 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 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.
Isis FAQ
How long does Isis take to flower?
Isis 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 Isis an indica or a sativa?
Isis is listed as mostly sativa.
What are the parents of Isis?
Isis was bred from Mostly Sativa by Dutch Passion.
How strong is Isis?
Reported THC for Isis is 15%. Actual potency depends heavily on environment, harvest ripeness, and cure quality.
What environment does Isis 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.
📷 Growing Isis and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Isis? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
Track your own grow free — the journal grades your environment against these bands →
Get the one-page grow reference card
VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.