Effects
G13 Haze effects: what people report
People most often describe G13 Haze as an uplifting, cerebral strain: Leafly’s top user reports are euphoric, happy and giggly, AllBud calls it energizing and creative, and its breeder says cerebral and uplifting with a relaxing body side. Dizziness, dry mouth and dry eyes are the most-reported downsides.1,2,3
This page reports what people and breeders describe. It is not medical advice, and it makes no claim that G13 Haze treats or prevents any condition.
What each source reports
| Source | Reported effects | Reported downsides |
|---|---|---|
| Leafly users (222 reviews) | Euphoric, happy, giggly; “uplifting sensations alongside heavy-hitting body effects”; rated mostly energizing1 | Dizzy, dry mouth, dry eyes1 |
| AllBud | Creative, energizing, euphoria, motivation, relaxing, uplifting; “a super energizing bud with long-lasting effects”2 | — |
| AllBud, entry for the Barney’s Farm version (31 votes) | Body high, euphoria, uplifting; an intense cerebral high with relaxing body effects4 | — |
| Weedmaps, quoting Barney’s Farm | “A powerful, psychotropic Sativa high”5 | — |
| Barney’s Farm (breeder), feminized | Creative, uplifting, invigorating, cerebral; “cerebral stimulation with a relaxing body high”3 | — |
| Barney’s Farm (breeder), regular | Powerful, creative, uplifting; “a powerful ‘creeper’ high” for daytime6 | — |
| SeedFinder growers (Barney’s line, 10 reviews) | Very strong and long-lasting; cerebral, thought-provoking7 | — |
These are self-reports and marketing descriptions, not clinical findings.
Energizing or sleepy?
Energizing, by every account. Leafly places G13 Haze on the energizing side of its scale, where it puts the parent G13 on the calming side with sleepy as its top effect; AllBud calls it super energizing; Barney’s Farm calls its regular version a daytime strain.1,2,6,8 Leafly’s own description still speaks of heavy-hitting body effects and Barney’s of a relaxing body high, so reports pair a head high with some body relaxation.1,3
Why two batches can feel different
Lab potency was fairly consistent in our small sample: the middle 80% of the 14 tests fell between 18.56% and 22.86% THC.9 The name covers more variation than that: six breeders sell a “G13 Haze”, Mr Nice calls its own “a bit less predictable”, and SeedFinder’s growers describe three phenotypes of the Barney’s line, from long sativa-leaning plants to short indica-leaning ones (see genetics).7,10,11
Sources
- Leafly, G13 Haze strain information. Accessed Oct 3, 2026.
- AllBud, G13 Haze marijuana strain information and reviews. Accessed Oct 3, 2026.
- Barney’s Farm, G13 Haze: feminized seed specifications. Accessed Oct 3, 2026.
- AllBud, BF G13 Haze (Barney’s Farm) marijuana strain information and reviews. Accessed Oct 3, 2026.
- Weedmaps, G13 Haze (aka G-13 Haze) strain page. Accessed Oct 3, 2026.
- Barney’s Farm, G13 Haze: regular seed specifications. Accessed Oct 3, 2026.
- SeedFinder, G13 Haze (Barneys Farm): strain info, breeder description, awards and grower reviews. Accessed Oct 3, 2026.
- Leafly, G13 (G-13) strain information. Accessed Oct 3, 2026.
- Cannlytics (CC BY 4.0), cannabis_results: public state lab results (filtered and aggregated by Official Cannabis). Accessed Oct 3, 2026.
- SeedFinder, All G13 Haze strains. Accessed Oct 3, 2026.
- Zamnesia, G13 Haze (Mr. Nice) regular seeds. Accessed Oct 3, 2026.