Purple Punch Auto brings one of the most popular American dessert strains into a fast autoflower that finishes in about 11 weeks from seed. Seedstockers crossed Purple Punch with its Northern Lights Auto (IBL), and the result keeps the sweet grape-berry candy terpenes and the deep purple coloring that made the original famous.
Yields are rated massive for an auto: 500–600 g/m² (1.64–1.97 oz/ft²) indoors under LED and 120–220 g/plant (4.2–7.8 oz/plant) outdoors in 15 L (4 gal) containers. The breeder marks it as an intermediate grow, mostly because getting the deepest color takes a little temperature control at the end.
The effect is a smooth indica wave that calms the body and brightens the mood without flattening it completely.
Genetics and Lineage of Purple Punch Auto
The listed genetics are Purple Punch x Northern Lights Auto (IBL). Purple Punch supplies the candy-grape terpene profile and the anthocyanin-rich buds, while the Northern Lights Auto inbred line provides the autoflowering trait, a sturdy indica frame, and dependable timing.
Seedstockers lists THC at 20–26% and classes the plant as an indica. It grows to a medium size with strong lateral branching, and in the last weeks of flower the buds often turn purple, especially when nights run cool.
Aroma, Flavor, and Effect
The scent is pure dessert: sweet grape and berry candy with a soft spicy undertone. Rubbing a bud releases that fruity note right away.
On the palate grape candy comes first, ripe berries fill the middle, and the exhale ends with a gentle spice and vanilla touch. It is sweet, smooth, and easy to recognize.
The high is relaxing and calming, with a pleasant lift in mood on top. It eases the body without full sedation, which makes it a good match for evenings at home and slow weekend afternoons.
Growing Purple Punch Auto Indoors and Outdoors
Indoors, run 18/6 or 20/4 light for the whole cycle. The medium-sized plant branches well, so light LST helps spread the side shoots and build an even canopy of dense, frosted buds.
For the deepest color, the breeder suggests dropping night temperatures by 5–10°C (9–18°F) during the last 14 days. Cooler nights intensify both the purple hues and the grape-berry terpenes. Keep airflow strong, because cool, humid nights can invite mold on dense buds.
Outdoors, grow it in 15 L (4 gal) containers in full sun. Expect 120–220 g (4.2–7.8 oz) per plant. Late-season runs in cooler climates show striking color as autumn nights drop.
Purple Punch Auto Characteristics
| Strain type | Autoflowering feminized |
| Genetics | Purple Punch x Northern Lights Auto (IBL) |
| Indica/Sativa | Indica |
| THC | 20–26% |
| Effect | Relaxing, calming, mood-lifting |
| Flavor | Grape candy, berries, spice, vanilla |
| Aroma | Sweet grape and berry candy with soft spice |
| Indoor yield | 500–600 g/m² (1.64–1.97 oz/ft²) |
| Outdoor yield | 120–220 g/plant (4.2–7.8 oz/plant) |
| Seed to harvest | 11 weeks |
| Height | Medium |
| Difficulty | Intermediate |
| Best cultivation technique | LST plus cool nights in late flower |
FAQ
Is Purple Punch Auto indica or sativa?
It is an indica. Seedstockers bred it from Purple Punch x Northern Lights Auto (IBL), which gives a sturdy frame and a calm, relaxing effect.
How long does Purple Punch Auto take to finish?
About 11 weeks from seed. It flowers on its own, so 18/6 or 20/4 light can stay in place from start to finish.
How do growers get purple buds on Purple Punch Auto?
Drop night temperatures by 5–10°C (9–18°F) for the last 14 days. Cool nights bring out the purple color and strengthen the grape-berry aroma.
How much does Purple Punch Auto yield?
Indoors, 500–600 g/m² (1.64–1.97 oz/ft²). Outdoors, 120–220 g/plant (4.2–7.8 oz/plant) in 15 L (4 gal) containers.
What does Purple Punch Auto taste like?
Grape candy and ripe berries, finishing with a soft spicy-vanilla exhale. It is a sweet, dessert-style profile.
Is Purple Punch Auto hard to grow?
It is rated intermediate. The plant itself is vigorous, but timing the cool nights and keeping dense buds dry takes some attention.
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