Forbidden Fruit Cake
- THC
- 24–27%
- Flowering
- 8–9 wk
- Terpene
- Limonene
- Effect
- Happy
- Difficulty
- Intermediate
Strain facts
Checked Oct 21, 2026 · 5 sources
Guru is a hybrid that's intermediate to grow. It was bred by Swamp Boy Seeds from Forbidden Fruit. Its THC is about 30% (sources say 15–30%), higher than 98% of the 2,347 strains in our database that list THC. It flowers in about 8.5 weeks (one source lists 8–9 weeks).
Learn to grow Guru: Indoor & Outdoor Growing course, $199
- Type
- Hybrid
- THC
- About 30%15–30% across 3 sources
- Lineage
- Forbidden Fruit
- Breeder
- Swamp Boy Seeds
- Grow difficulty
- Intermediate1 source
- Flowering
- About 8.5 weeks8–9 weeks · 1 source
5 sources for this profile
- Leafly public strain listing
- Weedmaps public strain listing
- Breeder information: Swamp Boy Seeds
Grow facts
- AllBud (strain database) THC
- Crop King Seeds (seed bank) CBD, difficulty, flowering, 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 Guru
The grow facts a breeder or public strain listing gives for Guru.
- Flowering time
- About 8.5 weeks8–9 weeks · 1 source. Faster than 49% of strains with a listed time
- Yield indoor
- About 350 g/m²300–400 g/m² (9.8–13.1 oz/ft²) · 1 source
- Yield outdoor
- About 450 g per plant400–500 g per plant (14–18 oz) · 1 source
- Difficulty
- Intermediate1 source. One of 884 intermediate-rated strains
Flowering window (weeks after the switch to 12/12)
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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.
About Guru
Guru is a hybrid cannabis strain credited to Swamp Boy Seeds. Its listed lineage is Forbidden Fruit.
How strong is Guru?
Public listings give Guru a THC level of 30%, which is in the upper third of our dataset. Compared with all strains in our research dataset that have their own THC figure, it is higher than roughly 98% of them. Potency varies by grower, batch and lab, so read these numbers as typical values, not guarantees.
Guru aroma, flavor and terpenes
Its most-reported flavor notes are diesel and tropical.
Reported effects of Guru
Commonly reported effects: sleepy, relaxed, happy, euphoric and hungry. These are user reports, not promises. Effects differ from person to person and depend on dose, setting and tolerance.
Guru family tree
Its parents, from published lineage.
Parents
This strain
GuruHybrid · 15–30% THC · 8–9 wk
Similar strains
Matched on shared parents, top terpenes, type and THC. Never on medical use.
Forbidden Jelly
- THC
- 20–25%
- Flowering
- 8–10 wk
- Terpene
- Limonene
- Effect
- Giggly
- Difficulty
- Intermediate
Forbidden Zkittlez
- THC
- 13–20%
- Flowering
- 8–9 wk
- Terpene
- Pinene
- Effect
- Relaxed
- Difficulty
- Beginner
Green Tea
- THC
- 18–25%
- Flowering
- 8–9 wk
- Terpene
- Limonene
- Effect
- Happy
- Difficulty
- Intermediate
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.
