Red Poison Auto is the strain that started much of Sweet Seeds’ Red Family. Listed as variety SWS39, it crosses the much-loved Green Poison (SWS14) with an exotic purple-flowered autoflower descending from Pakistani Kush, and around 95% of plants develop red to purple flowers.
Its genetics are clearly indica-leaning at 76.9% Indica, 20% Sativa and 3.1% Ruderalis, yet the plant grows with the look of an indica-sativa hybrid and shows strong hybrid vigor from the seedling stage on. Expect a sturdy main stem, long and flexible side branches and thick, dense buds covered in aromatic resin.
Plants reach 60–120 cm (24–47 in) and are ready about 8 weeks after germination. Its awards and its role as a parent of several newer Red Family strains show how much the breeder trusts this line.
Green Poison x Purple Pakistani Kush Auto
Green Poison is one of the most appreciated strains in the Sweet Seeds catalog, known for its sweet, fruity aroma and fast, productive flowering. The Pakistani Kush auto partner brought purple pigmentation and the autoflowering trait, so the cross keeps Green Poison’s flavor while adding color and an automatic cycle.
The breeder lists two awards: 1st Prize in the autoflowering category at the Copa Cata Don Cacho (La Rioja, Argentina, 2019) and 3rd Prize in the autoflowering category at the IV Cata Invernal ACMF (Miranda de Ebro, 2016). Red Poison Auto has since become a parent of Red Strawberry Banana Auto, Red Pure CBD Auto and Red Mandarine F1 Fast Version.
Aroma, Flavor and Effect
The taste and aroma are pleasant and intense: sweet and fruity, like ripe berries and candied fruit, sitting on a soft Skunk background that adds a little earthy funk. It is approachable and easy to enjoy, with enough depth to stay interesting jar after jar.
THC is listed at 15–19% with about 0.8% CBD. The effect is relaxing and creative: the body unwinds while the mind stays imaginative and in a good mood. It is a comfortable evening strain that still leaves room for music, conversation or a creative hobby.
The colorful buds and reddish resin also make it a favorite for growers who like their harvest to look as good as it smells.
Growing Red Poison Auto Indoors and Outdoors
No light switch is needed. Run 18/6 or 20/4 from seed to harvest and Red Poison Auto will flower automatically after a few weeks of growth. Plant directly into an 11–15 liter (3–4 gallon) container, since its vigor quickly fills the pot.
Indoors the breeder lists 400–550 g/m² (1.31–1.80 oz/ft²). The long, flexible side branches are ideal for LST: bend them outward in weeks two and three to create an even canopy where every bud gets light. Keep air moving well in late bloom to protect the thick, dense colas.
Outdoors, each plant gives 35–175 g/plant (1.2–6.2 oz/plant). The short cycle allows several sowings between spring and fall, and cooler late-season nights tend to deepen the red color.
Red Poison Auto Characteristics
| Strain type | Feminized autoflowering |
| Variety code | SWS39 |
| Genetics | Green Poison (SWS14) x Pakistani Kush Auto (purple-flowered) |
| Indica/Sativa | 76.9% Indica / 20% Sativa / 3.1% Ruderalis |
| THC | 15–19% |
| CBD | 0.8% |
| Effect | Relaxing, creative |
| Aroma/Flavor | Sweet, fruity, soft Skunk |
| Indoor yield | 400–550 g/m² (1.31–1.80 oz/ft²) |
| Outdoor yield | 35–175 g/plant (1.2–6.2 oz/plant) |
| Seed to harvest | 8 weeks from germination |
| Height | 60–120 cm (24–47 in) |
| Best cultivation technique | LST on flexible side branches |
FAQ
Does Red Poison Auto always produce red flowers?
Almost always. Sweet Seeds reports colored flowers in approximately 95% of specimens.
Is Red Poison Auto indica or sativa?
It is indica-dominant at 76.9% Indica, 20% Sativa and 3.1% Ruderalis, though it grows with a hybrid-style structure and long side branches.
What does Red Poison Auto taste like?
Sweet and fruity, with a soft Skunk background.
Has Red Poison Auto won any awards?
The breeder lists 1st Prize in the autoflowering category at the Copa Cata Don Cacho (Argentina, 2019) and 3rd Prize in the autoflowering category at the IV Cata Invernal ACMF (2016).
How long does Red Poison Auto take from seed to harvest?
About 8 weeks from germination, under 18/6 or 20/4 light for the whole cycle.
Do Sweet Seeds packs include free seeds?
Yes. Sweet Seeds adds free bonus seeds to its smaller packs: the 3-seed pack ships with 1 free bonus seed and the 5-seed pack ships with 2 free bonus seeds, so you get 4 or 7 seeds in total. The 25-seed pack comes without bonus seeds.
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