Purple Haze Auto is Fast Buds’ modern take on a name that has been part of cannabis culture since the 1960s. Instead of chasing an old cut, the breeders built it from their own lines, Purple Lemonade Auto F6 x Amnesia Haze Auto F5, and stabilized it as an F3 feminized polyhybrid. The 2025 remaster leans even harder into the euphoric, electric energy the name suggests.
She is quick: about 8 weeks from seed to harvest, with no light-schedule switch required. An 18/6 or 20/4 cycle from day one is all she needs. In Fast Buds’ L size class, she stays at a compact 60-100 cm (24-39 inches), which suits small tents, balconies and stealth gardens.
Small does not mean stingy. Indoors she yields 400-550 g/m² (1.3-1.8 oz/ft²), and outdoor plants give 50-150 g (2-5 oz) each. Genetically she is 55% Sativa / 45% Indica, with up to 23% THC.
The colas come in dense, frosty and streaked with purple, and they can get heavy enough to need a little support near the end.
Color, Flavor and a Clear Sativa Lift
Cooler temperatures deepen her purple tones, which makes her a strong option for outdoor growers in northern climates and for indoor gardens where night temperatures can drop during late flower. Under LEDs, a modest day/night temperature gap in the final weeks often brings out the color.
The terpene profile mixes sweet cherry, sour lemon and classic haze for a smoke that is smooth with a tangy bite. It tastes bright and fresh rather than heavy.
Her short cycle makes her easy to fit into a busy schedule: indoor growers can turn a tent around quickly, and outdoor growers can squeeze in a crop before or after the main summer season. She performs with basic maintenance, so there is no need for heavy training; just keep the canopy airy and stake the top colas if they start to lean.
Growers who have smoked her most often report feeling uplifted, happy and creative, with plenty of energy and a relaxed undertone. The high is light and euphoric without the jittery edge some old-school hazes are known for, which makes it a nice fit for daytime, social plans or creative work.
Purple Haze Auto Characteristics
| Strain type | Autoflowering (feminized) |
| Genetics | Purple Lemonade Auto F6 x Amnesia Haze Auto F5 (F3 polyhybrid) |
| Indica/Sativa | 45% Indica / 55% Sativa |
| THC | Up to 23% |
| CBD | Less than 1% |
| Effect | Uplifted, happy, creative, energetic |
| Flavor | Sweet cherry, sour lemon, haze |
| Indoor yield | 400-550 g/m² (1.3-1.8 oz/ft²) |
| Outdoor yield | 50-150 g/plant (2-5 oz/plant) |
| Seed to harvest | 8 weeks |
| Height | 60-100 cm (24-39 inches), L size class |
| Climate | Cool nights boost purple color; suits northern outdoor grows |
| Best cultivation technique | Minimal training; support colas, cooler late-flower nights |
FAQ
Is Purple Haze Auto the original 1960s Purple Haze?
No. It is Fast Buds’ modern autoflower interpretation, bred from Purple Lemonade Auto F6 and Amnesia Haze Auto F5 and remastered in 2025.
How fast is Purple Haze Auto?
About 8 weeks from seed to harvest, with no need to change the light schedule. Run 18/6 or 20/4 throughout.
How tall does Purple Haze Auto get?
She is in Fast Buds’ L size class, growing 60-100 cm (24-39 inches) tall.
How do I get the most purple color?
Cooler temperatures intensify her color. Outdoors in northern climates this happens naturally; indoors, a drop in night temperatures during late flower can help.
What yield does Purple Haze Auto produce?
Indoors, 400-550 g/m² (1.3-1.8 oz/ft²). Outdoors, around 50-150 g (2-5 oz) per plant.
What does Purple Haze Auto taste like?
A mix of sweet cherry, sour lemon and classic haze, smooth with a tangy finish.
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