Schrom
- THC
- 16–20%
- Flowering
- 9–11 wk
- Terpene
- Terpinolene
- Effect
- Energetic
Romulan strain
White Rhino × North American Indica
Strain facts
Checked Oct 21, 2026 · 5 sources
Romulan is an indica that's intermediate to grow. It was bred from White Rhino and North American Indica. Its THC is about 21% (sources say 19–24%), higher than 46% of the 2,347 strains in our database that list THC. It flowers in about 8 weeks (sources say 8–9 weeks).
Learn to grow Romulan: Indoor & Outdoor Growing course, $199
- Type
- Indica
- THC
- About 21%19–24% across 4 sources
- CBD
- About 1%0–1% across 3 sources
- Top terpenes
- Myrcene earthy, musky
- Caryophyllene peppery, spicy
- Lineage
- White Rhino × North American Indica
- Grow difficulty
- Intermediate3 sources, from beginner to intermediate
- Flowering
- About 8 weeks8–9 weeks across 2 sources
5 sources for this profile
- Leafly public strain listing
- Weedmaps public strain listing
Grow facts
- AllBud (strain database) CBD and THC
- Crop King Seeds (seed bank) CBD, difficulty, flowering, THC, yield indoor and yield outdoor
- Zamnesia (seed bank; breeder: Pyramid Seeds) CBD, difficulty, flowering, height, grow setting, THC, yield indoor and yield outdoor
Grow facts come from the breeder first, then seed banks and strain databases. With 2 sources we show the range and the middle; with 3 or more, the range and the median, after leaving out values far from the rest. The breeder's own value is the anchor, unless it is far from every other source (outside their range and more than 20% from their median); then we show the full range and the median of all of them. A fact from a single source is marked "1 source", and a fact no source lists is left out. Yields are converted to one unit: indoor per square meter, outdoor per plant.
CTU writes every profile from these facts; we do not copy other sites' descriptions. Values that are a generic default in the source data are left out. Last checked Oct 21, 2026.
Source: CTU strain dataset (public strain listings and breeder info, checked by CTU), verified Oct 2026. Potency, flavor and effects vary by grower, batch and plant. Facts no source lists are left out.
How to grow Romulan
The grow facts a breeder or public strain listing gives for Romulan.
- Flowering time
- About 8 weeks8–9 weeks across 2 sources. Faster than 80% of strains with a listed time
- Yield indoor
- About 350 g/m²250–450 g/m² (8.2–14.8 oz/ft²) across 2 sources
- Yield outdoor
- About 750 g per plant450–1,000 g per plant (16–35 oz) across 2 sources
- Plant height
- About 90 cm1 source
- Difficulty
- Intermediate3 sources, from beginner to intermediate. One of 884 intermediate-rated strains
- Grow setting
- Indoor and outdoor1 source
Flowering window (weeks after the switch to 12/12)
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
Sources: the breeder, seed banks and strain databases listed under sources, checked Oct 2026. Percentages compare with every strain in our database that lists the same fact.
Learn to grow Romulan: Indoor & Outdoor Growing course, $199
About Romulan
Romulan is listed in public strain databases as an indica. Its listed parents are White Rhino and North American Indica.
How strong is Romulan?
Public listings give Romulan a THC level of 19%, which is in the lower third of our dataset. Compared with all strains in our research dataset that have their own THC figure, it is higher than roughly 30% of them. Potency varies by grower, batch and lab, so read these numbers as typical values, not guarantees.
Romulan aroma, flavor and terpenes
People most often describe the flavor of Romulan as pine, earthy and woody. The terpenes listed most often are myrcene (earthy, musky) and caryophyllene (peppery, spicy). Myrcene is the lead terpene for about 44% of the high-confidence strains in our dataset, so it is a common profile. Terpenes shape smell and taste; their levels change from batch to batch.
Reported effects of Romulan
People who have tried Romulan most often report feeling sleepy, relaxed, hungry, tingly and euphoric. These are user reports, not promises. Effects differ from person to person and depend on dose, setting and tolerance.
Growing Romulan: what the data says
Grow difficulty is listed as beginner. Grow where home cultivation is legal, and follow your state rules.
Romulan family tree
Parents and the strains bred from it, from published lineage.
This strain
RomulanIndica · 19–24% THC · 8–9 wk
Bred from it
Romulan GrapefruitRomulan x Grapefruit
Area 51Smurfberry x Snowdawg x Romulan
Romulan HazeSuper Silver Haze x Romulan
White RomulanThe White x Romulan
ChupacabraHawaiian x Romulan
Similar strains
Matched on shared parents, top terpenes, type and THC. Never on medical use.
Blue Rhino
- THC
- 15–25% · CBD 1–2%
- Flowering
- 8–10 wk
- Terpene
- Limonene
- Effect
- Sleepy
- Difficulty
- Intermediate
Green Lantern
- THC
- 20–23%
- Flowering
- 8–10 wk
- Terpene
- Caryophyllene
- Effect
- Focused
- Difficulty
- Intermediate
- Height
- Very tall
Pure Power Plant
aka PPP
- THC
- 20–21%
- Flowering
- 8–11 wk
- Terpene
- Myrcene
- Effect
- Energetic
- Difficulty
- Beginner
Where to buy
Find licensed dispensaries in your state
Only state-licensed stores, checked against official license lists.
Grow it
Flowering time, height and difficulty from the sources, then the full method in the Growing course.
