Ash
- THC
- 14–20%
- Flowering
- 8–10 wk
- Terpene
- Myrcene
- Effect
- Uplifted
Critical Haze strain
Bred by Mr. Nice Seeds · Critical Mass × Afghan Haze
Strain facts
Checked Oct 21, 2026 · 6 sources
Critical Haze is a hybrid that's intermediate to grow. It was bred by Mr. Nice Seeds from Critical Mass and Afghan Haze. Its THC is about 22% (sources say 21–23%), higher than 57% 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 Critical Haze: Indoor & Outdoor Growing course, $199
- Type
- Hybrid
- THC
- About 22%21–23% across 2 sources
- Top terpenes
- Limonene citrus
- Myrcene earthy, musky
- Caryophyllene peppery, spicy
- Lineage
- Critical Mass × Afghan Haze
- Breeder
- Mr. Nice Seeds
- Grow difficulty
- Intermediate1 source
- Flowering
- About 9 weeks8–10 weeks across 3 sources; the breeder lists 9 weeks
6 sources for this profile
- Leafly public strain listing
- Weedmaps public strain listing
- Breeder information: Mr. Nice Seeds
Grow facts
- SeedFinder (breeder listing: Mr. Nice Seeds) Flowering and grow setting
- AllBud (strain database) THC
- Zamnesia (seed bank; breeder: Mr. Nice) Difficulty, flowering, grow setting and yield indoor
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 Critical Haze
The grow facts a breeder or public strain listing gives for Critical Haze.
- Flowering time
- About 9 weeks8–10 weeks across 3 sources; the breeder lists 9 weeks. Slower than 51% of strains with a listed time
- Yield indoor
- Up to 650 g/m²Up to 650 g/m² (21.3 oz/ft²) · 1 source
- Difficulty
- Intermediate1 source. One of 884 intermediate-rated strains
- Grow setting
- Indoor, outdoor and greenhouseFrom the breeder · 2 sources
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 Critical Haze: Indoor & Outdoor Growing course, $199
About Critical Haze
Critical Haze is listed in public strain databases as a hybrid from the breeder Mr. Nice Seeds. The parent strains on record are Critical Mass and Afghan Haze.
Critical Haze THC level
Public listings give Critical Haze a THC level of 23%, which is on the strong end. Compared with all strains in our research dataset that have their own THC figure, it is higher than roughly 74% of them. Potency varies by grower, batch and lab, so read these numbers as typical values, not guarantees.
Critical Haze aroma, flavor and terpenes
Its most-reported flavor notes are citrus, sweet and earthy. Its top listed terpenes are limonene (citrus), myrcene (earthy, musky) and caryophyllene (peppery, spicy). Limonene is the lead terpene for about 21% of the high-confidence strains in our dataset, so it is a less common lead. Terpenes shape smell and taste; their levels change from batch to batch.
Reported effects of Critical Haze
Commonly reported effects: happy, hungry, relaxed, uplifted and euphoric. These are user reports, not promises. Effects differ from person to person and depend on dose, setting and tolerance.
Growing Critical Haze: what the data says
Its listed indoor flowering time is 8–10 weeks. Grow where home cultivation is legal, and follow your state rules.
Critical Haze family tree
Its parents, from published lineage.
This strain
Critical HazeHybrid · 21–23% THC · 8–10 wk
Similar strains
Matched on shared parents, top terpenes, type and THC. Never on medical use.
Critical Hog
- THC
- 15–24%
- Flowering
- 7–9 wk
- Terpene
- Myrcene
- Effect
- Relaxed
- Difficulty
- Beginner
Critical Kali Mist
aka Critical Kali, Critical Mist
- THC
- 20–22%
- Flowering
- 9–12 wk
- Terpene
- Myrcene
- Effect
- Uplifted
Critical Purple Kush
- THC
- 13–18%
- Flowering
- 8–9 wk
- Terpene
- Myrcene
- Effect
- Happy
- Difficulty
- Intermediate
- Height
- Short
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.
