Purple Punch Auto by Fast Buds – XXL Indica-Dominant Autoflower with 24% THC & Blueberry Muffin Flavor

Purple Punch Auto by Fast Buds is a monster indica-dominant autoflower that delivers up to 600 g/m² of frosty, aromatic buds in just 9 weeks — no green thumb required.

Are you tired of weak autos that look more like herbs than powerhouses?

Most autoflowers promise big yields but collapse under their own weight, lack flavor, or fizzle out before they even peak. You end up with airy buds, bland smoke, and wasted time.

What happens when your plant stretches too much, smells like nothing, and barely hits 15% THC?

You’re stuck with a forgettable harvest — not the knockout punch you were promised. You waste lights, nutrients, and space on a plant that doesn’t deliver the flavor, potency, or visual appeal you expect from a modern Cali strain.

Meet the knockout punch you’ve been waiting for: Purple Punch Auto

This XXL autoflower packs 24% THC, a dessert-like blueberry muffin and cherry flavor, and yields that reach up to 600 g/m² indoors. With thick colas, vibrant purple hues, and a high that melts stress without locking you to the couch, it’s the complete package — and it grows like a beast.

What this strain delivers in just 9 weeks

Purple Punch Auto isn’t just big — it’s balanced. You get massive yields, intense flavor, and a relaxing yet functional high, all in a plant that’s easy to manage and forgiving for beginners.

Key features and benefits in a nutshell

• Up to 600 g/m² (2.12 oz/ft²) — harvest monster yields even in tight spaces.
• 24% THC potency — enjoy a powerful, fast-acting effect that starts uplifting and melts into deep relaxation.
• Blueberry muffin & cherry flavor — taste a sweet, spicy dessert-like smoke that lingers on your palate.
• 9-week life cycle — from seed to harvest in just 63 days, perfect for quick turnover.
• XXL size (1.50 m / 4.92 ft) — grow a giant autoflower that dominates your grow room.
• Dense, frost-covered buds — produce resin-rich flowers ideal for extracts and concentrates.
• Indica 85% / Sativa 15% — get full-body relaxation with a clear, creative head buzz — no couch lock.

How to grow Purple Punch Auto in 5 simple steps

1. Start with a 18–27 L pot and a well-draining soil or coco mix — this auto thrives when given space early.
2. Use an 18/6 or 20/4 light cycle from seed to harvest — no photoperiod switch needed.
3. Water when the top inch of soil feels dry — avoid overwatering, especially in late veg.
4. Support the main cola with a stake if needed — this plant gets heavy in flowering.
5. Harvest when trichomes turn milky to amber — usually around day 63 for peak potency.

Technical specifications

• Breeder / Brand: Fast Buds
• Type: Feminized Autoflowering
• Dominance: Indica 85% / Sativa 15%
• Genetics: Purple Punch F2 Symbiotic Genetics × LSD-25 Auto
• Cycle: 9 weeks (germination to harvest)
• Indoor Yield: 450–600 g/m² (1.59–2.12 oz/ft²)
• Outdoor Yield: 2–7 oz/plant (56–198 g/plant)
• Indoor Height: 0.85–1.50 m (2.79–4.92 ft)
• Outdoor Height: up to 1.50 m (4.92 ft)
• Difficulty: Low to medium
• Structure: Thick main cola, wide internodal spacing, bushy branching
• Stretch: Significant in pre-flowering — plan for vertical space
• Ideal Climate: Warm to hot — thrives in Mediterranean and continental climates
• Resistance: Moderate resistance to mold; avoid high humidity in flowering
• Training: Responds well to LST and SCROG — avoid topping or aggressive pruning
• Recommended Pot: 18–27 L final pot
• Substrate: Soil or coco with good drainage and aeration
• Light Cycle: 18–20 h/day all cycle long
• Temperature: 22–26 °C (71.6–78.8 °F) in veg; 20–25 °C (68–77 °F) in flower
• Humidity: 60–70% seedling; 50–60% veg; 40–50% flower
• pH: 6.0–6.5 (soil); 5.8–6.2 (coco/hydro)
• Smell in Grow: Strong — use a carbon filter if discretion is needed
• THC: 24% (approx.)
• CBD:
• Aromatic Profile: Myrcene, caryophyllene, limonene
• Flavour: Blueberry muffin, cherry, spicy, sweet
• Effect: Relaxing, euphoric, clear-headed — ideal for evening use or stress relief

How to grow Purple Punch Auto for maximum yield

Maximize your harvest with these pro tips based on genetics and grower feedback.

Quick overview: Fast Buds’ Purple Punch Auto — 9-week autoflower, low to medium difficulty, ideal for indoor or warm outdoor grows.

Safe start: Germinate in a moist, warm environment (22–25 °C). Transplant carefully when the taproot is ~1 cm long. For a hassle-free start, Kit Biobizz outdoor boosts early root development and reduces stress.

Stable seedling: Keep humidity high (60–70%) and light gentle. Use a well-aerated soil. In sustained growth, Root Juice BioBizz keeps roots strong and leaves vibrant without overloading nitrogen.

Directed growth: Maintain 18–20 h of light daily. Use LST to spread the canopy and expose more bud sites. Water when the top layer dries — this plant hates soggy roots.

Flowering by stages: In early flower, keep humidity at 50–60%. In mid to late flower, drop to 40–50% to prevent mold. Support heavy colas with stakes. At the end of flowering, Bio Bloom BioBizz helps with density and a cleaner, terpene-rich finish.

Harvest, drying and curing: Harvest when 70% of trichomes are milky and 30% amber for balanced effects. Flush 7–10 days before harvest. Dry at 18–22 °C and 50–60% RH for 7–10 days. Cure in jars for 4–6 weeks, burping daily.

Frequently Asked Questions

How long does Purple Punch Auto take from seed to harvest?

Approximately 9 weeks (63 days), starting from germination. Some phenotypes may finish slightly earlier or later depending on conditions.

Does it really taste like blueberry muffin?

Yes — many growers report a strong blueberry muffin aroma with hints of cherry and spice, especially after curing. The terpene profile makes it stand out in flavor.

Can I grow this outdoors in a colder climate?

It prefers warm to hot climates, but can handle moderate temps down to 15 °C. Avoid cold, wet conditions to prevent mold. Use a greenhouse or cover during rain.

Is it mold-resistant?

It has moderate resistance, but dense buds require good airflow. Avoid high humidity in late flowering and use LST to open up the canopy.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Purple Punch Auto in my 3x3 tent with a 600W LED and 20/4 light cycle. From day one, it stood out — fast germination, explosive growth, and that unmistakable sweet-spicy scent by week 4. I used LST early to control height and maximize light exposure. By week 6, the trichomes were already glistening like snow.

I harvested on day 63. The buds were rock-hard, covered in resin, and showed beautiful purple and lime-green hues. After a 10-day flush and 6-week cure, the flavor exploded — like biting into a blueberry pastry. The high? Instant relaxation without brain fog. Perfect for unwinding after a long day or sharing with friends.

What I love most is how forgiving it is. Even with minor nutrient bumps, it bounced back. If you want a high-yielding, flavorful, and potent auto that doesn’t need babysitting, this is it. I’ve added it to my permanent rotation — and so will you.