BlackBerry 420 Fast Buds Autoflowering Seeds · Fast-Growing Indica-Dominant Strain with Purple Hues and Berry Flavor

BlackBerry 420 Fast Buds is your go-to autoflowering strain for rich flavor, striking visuals, and smooth, calming effects—all wrapped in a low-maintenance growing experience that just works.

Worried your setup isn’t stealthy or strong enough?

Maybe you’ve tried growing before and ended up with weak yields, pale buds, or plants that screamed for attention with their smell and size. You don’t want to draw eyes or waste time on finicky strains that demand PhD-level care.

Stress, inconsistency, and wasted effort add up fast

Every failed germination, every yellowing leaf, every underwhelming harvest chips away at your confidence. You’re not just growing plants—you’re chasing a moment of calm, a personal ritual, a reward for your effort. When the process feels like a chore, the payoff just isn’t worth it.

Meet your new favorite autoflower: powerful, predictable, and packed with flavor

BlackBerry 420 Fast Buds changes the game. With genetics fine-tuned for resilience and performance, it grows strong with minimal input, finishes in about 9 weeks, and rewards you with frosty, deep purple buds that smell like a basket of wild berries. It’s the strain that grows like a weed but smokes like a prizefighter—up to 23% THC and a body-melting high that’s perfect for unwinding.

More discretion, fewer worries

This compact powerhouse stays manageable at 80–110 cm (2.62–3.61 ft), making it ideal for small tents or discreet outdoor spots. Its rapid life cycle means less time in the spotlight and lower risk of detection. Even its scent, while delicious, is moderate—especially when grown with good airflow. Pair it with a carbon filter from our grow shop and you’ve got a truly stealthy setup.

Control over the experience

• Autoflowers in 8–9 weeks—no light cycle changes needed
• Consistent yields of 450–550 g/m² (1.6–2 oz/ft²) indoors, 90–140 g/plant (3.2–4.9 oz/plant) outdoors
• Stable genetics mean every plant performs like the last
• Indica-dominant structure resists mold and pests
• Thrives in soil or coco with minimal feeding
• Handles light training like LST for better light exposure
• Develops vivid purple pigments under cooler nights

How to use it responsibly and comfortably

Start right and your plants will thank you. Keep the environment stable, avoid overwatering, and let the genetics do the rest.

1. Germinate seeds in a moist paper towel or starter cube at 22–25 °C (71.6–77 °F)
2. Transplant carefully into a 20 L (5.3 gal) pot early—ideal for autoflowers
3. Use well-draining soil or coco with added perlite for root health
4. Provide 18–20 hours of light daily throughout the entire cycle
5. Water when the top inch of soil feels dry—less is more
6. Keep humidity at 60–70% in seedling, 50–60% in veg, 40–50% in flower
7. Ensure good airflow to prevent mold, especially in dense canopies
8. Harvest when trichomes turn milky to amber for your preferred effect

Benefits of having everything under control

• Harvest faster with no guesswork on light cycles
• Enjoy consistent, high-THC buds every time
• Feel confident, even as a first-time grower
• Save time and energy with minimal maintenance
• Experience deep relaxation without anxiety
• Share premium-quality bud with friends
• Sleep better after a long day

Technical specifications

• Breeder / Brand: Fast Buds
• Type: Autoflowering
• Dominance: Indica-dominant hybrid
• Genetics: Blackberry × Fast Flowering Ruderalis
• Life cycle: 8–9 weeks from seed to harvest
• Indoor yield: 450–550 g/m² (1.6–2 oz/ft²)
• Outdoor yield: 90–140 g/plant (3.2–4.9 oz/plant)
• Indoor height: 80–110 cm (2.62–3.61 ft)
• Outdoor height: 90–120 cm (2.95–3.94 ft)
• Difficulty: Low
• Structure: Bushy, tight internodal spacing, strong main cola
• Climate: Temperate, Mediterranean; tolerates mild cold
• Resistance: High resistance to mold, pests, and stress
• Training: Suitable for LST; avoid topping or FIM
• Recommended pot: 18–27 L (4.8–7.1 gal) final pot
• Light: 18–20 h daily
• Temperature: 22–26 °C (71.6–77 °F) veg; 20–25 °C (68–77 °F) 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: Medium
• THC: Up to 23%
• CBD: Approx. 1%
• Aromatic profile: Myrcene, caryophyllene, limonene
• Flavour: Sweet berries, earthy Kush, subtle citrus
• Effect: Deep body relaxation, couch-lock, stress relief—ideal for nighttime

Frequently Asked Questions

How discreet is BlackBerry 420 Fast Buds?

Very. It stays short, grows fast, and has a moderate scent. Use an inline carbon filter and you’ll fly under the radar.

Can beginners grow this strain successfully?

Absolutely. It’s forgiving, resistant, and doesn’t need advanced techniques. Just water, light, and patience.

Does it turn purple, and how?

Yes! Cooler nighttime temps (around 15 °C / 59 °F) during flowering enhance the purple anthocyanin pigments.

What’s the best way to maximize yield?

Use LST early, provide strong light (600W+ LED), and feed moderately. Try Voodoo Juice for root mass and Super PK in mid-flower for denser buds.

Is it good for stress and relaxation?

Yes—its indica-driven high melts tension and promotes deep calm. Perfect for unwinding after a long day.

Personal Experience of Pevgrow’s CEO (Alan)

I grew BlackBerry 420 Fast Buds in my 1.2 x 1.2 m (4 x 4 ft) tent with a Mars Hydro 600W. Planted three in 20 L pots, used Light Mix from Canna with a bit of perlite. I did light LST in week 3—just bending the branches down to spread the canopy. No topping, no stress. Fed with Biocanna Kit and added Super PK at week 5.5. The smell was sweet and earthy, never overwhelming. By week 9, I had thick, purple-tinged colas dripping with resin. Dried slowly at 18 °C (64.4 °F) and 55% RH for 10 days, then cured for three weeks. The high? Instant body melt, zero anxiety. I keep this one on rotation—simple, reliable, and damn tasty.