Apple Runtz
- THC
- 14%
- Flowering
- 8–10 wk
- Terpene
- Limonene
- Effect
- Energetic
- Difficulty
- Intermediate
Black Runtz strain
Bred by Big Boss Farms · Gelato × The Original Z
Strain facts
Checked Oct 21, 2026 · 4 sources
Black Runtz is a hybrid that's intermediate to grow. It was bred by Big Boss Farms from Gelato and The Original Z. Its THC is about 24% (sources say 19–29%), higher than 77% of the 2,347 strains in our database that list THC. It flowers in about 9 weeks (sources say 8–10 weeks).
Learn to grow Black Runtz: Indoor & Outdoor Growing course, $199
- Type
- Hybrid
- THC
- About 24%19–29% across 4 sources
- CBD
- About 0.4%0–1% across 2 sources
- Top terpenes
- Limonene citrus
- Myrcene earthy, musky
- Caryophyllene peppery, spicy
- Flavors
- Earthy
- Lineage
- Gelato × The Original Z
- Breeder
- Big Boss Farms
- Grow difficulty
- Beginner to intermediate2 sources
- Flowering
- About 9 weeks8–10 weeks across 2 sources
4 sources for this profile
- CTU strain dataset (public strain listings)
Grow facts
- AllBud (strain database) THC
- Crop King Seeds (seed bank) CBD, difficulty, flowering, THC, yield indoor and yield outdoor
- Zamnesia (seed bank; breeder: Zamnesia 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 Black Runtz
The grow facts a breeder or public strain listing gives for Black Runtz.
- Flowering time
- About 9 weeks8–10 weeks across 2 sources. Slower than 51% of strains with a listed time
- Yield indoor
- About 475 g/m²400–500 g/m² (13.1–16.4 oz/ft²) across 2 sources
- Yield outdoor
- About 600 g per plant500–650 g per plant (18–23 oz) across 2 sources
- Plant height
- About 160 cm1 source
- Difficulty
- Beginner to intermediate2 sources. 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 Black Runtz: Indoor & Outdoor Growing course, $199
About Black Runtz
Black Runtz is an indica-dominant hybrid with a THC range of 24-28%. Bred by Big Boss Farms, it combines the genetics of Gelato and Zkittlez, offering a unique profile that appeals to both growers and consumers alike. Its dense buds are characterized by deep purple hues and a frosty appearance, setting it apart from similar strains.
Effects people report
The high from Black Runtz begins with a wave of euphoria, gradually settling into a deep relaxation. Users often feel a sense of happiness and tranquility, making it suitable for evening use. The effects can last for 2-3 hours before gently fading away, ensuring a smooth return to baseline without any harsh comedown.
Flavor and aroma
Upon opening a jar of Black Runtz, you are greeted with a sweet and fruity aroma reminiscent of berries and citrus. The flavor on inhale is rich and dessert-like, while exhaling brings forth a creamy sweetness. Proper curing enhances the overall flavor profile, making it more pronounced and enjoyable.
Growing notes
Black Runtz thrives in both indoor and outdoor environments, with indoor setups allowing for better control over conditions. It requires attentive training methods such as LST and topping to optimize yield and maintain a manageable canopy. Humidity levels should be kept between 40-50% during flowering, and temperatures around 70-80 deg F are ideal. Proper nutrient management is crucial, as this strain can be sensitive to nutrient levels, especially during the flowering phase.
Grower tips
- Top plants in week 3 of veg to promote multiple colas
- Maintain humidity at 40-45% during flowering to prevent mold
- Start feeding at 0.8 EC and gradually increase
- Ensure adequate airflow to prevent bud rot in dense colas.
Common mistakes
- Overwatering early can lead to root rot and stunted growth
- Harvesting too early results in lower potency and diminished flavor
- Allowing late-flower humidity to exceed 50% can cause bud rot
- Delaying topping past week 2 of veg can lead to an unmanageable canopy.
Expert insight
The dense bud structure of Black Runtz requires careful airflow management during late flower to avoid mold. With high humidity sensitivity, maintaining a stable environment is crucial for preserving its rich terpene profile.
Who should grow Black Runtz?
Indoor growers using topping or SCROG will appreciate the manageable plant size and yield potential. Experienced outdoor growers in warm, dry climates will find success with this strain's adaptability and high yield potential. Those focused on resin production will benefit from its very high resin levels.
How it compares
Compared to Runtz, Black Runtz has a darker appearance and a slightly higher THC concentration. While Gelato offers a sweeter profile, Black Runtz provides a more complex berry flavor. Zkittlez tends to be more uplifting, whereas Black Runtz leans towards a relaxing effect.
Black Runtz FAQ
What is the THC level of Black Runtz?
Black Runtz typically has a THC level ranging from 24% to 28%, making it a potent choice for experienced users. Its high THC content contributes to its powerful effects and appeal.
Is Black Runtz indica or sativa?
Black Runtz is classified as an indica-dominant hybrid, primarily derived from the genetics of Gelato and Zkittlez. This combination results in a strain that is relaxing yet euphoric.
How long does Black Runtz take to flower?
The flowering time for Black Runtz is approximately 8 to 9 weeks. This duration allows the buds to develop fully and achieve their characteristic potency and flavor.
Is Black Runtz easy to grow?
Black Runtz can be moderately challenging to grow due to its sensitivity to humidity and nutrients. However, with proper care and attention, growers can achieve impressive yields.
What does Black Runtz taste like?
The flavor profile of Black Runtz is sweet and fruity, featuring notes of berries and citrus. This delightful taste is complemented by a creamy exhale that enhances the overall experience.
Black Runtz family tree
Its parents, from published lineage.
This strain
Black RuntzHybrid · 19–29% THC · 8–10 wk
Similar strains
Matched on shared parents, top terpenes, type and THC. Never on medical use.
Banana Gelato
- THC
- 20–28%
- Flowering
- 8–10 wk
- Effect
- Creative
- Difficulty
- Intermediate
Biscotti Gelato
- THC
- 18–25%
- Flowering
- 8–10 wk
- Terpene
- Myrcene
- Effect
- Relaxed
- Difficulty
- Intermediate
Biscotti Pancakes
- THC
- 20–30%
- Flowering
- 8–9 wk
- Terpene
- Caryophyllene
- Effect
- Tingly
- Difficulty
- Intermediate
Hybrid strainsLimonene strainsEarthy strainsStrains bred from Gelato
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.
