Fastberry Auto by FastBuds – Sweet Blueberry Autoflowering Strain for Fast Harvests

Fastberry Auto by FastBuds is a fast-finishing, indica-dominant autoflower that packs a punch with sweet blueberry flavor, dense purple buds, and up to 19% THC—all in just 9 weeks from seed to harvest.

Still chasing weak yields and bland flavors with your autoflowers? Most budget-friendly strains promise big but deliver small—harsh smoke, disappointing potency, and plants that collapse under stress. You end up wasting time, money, and grow space on genetics that don’t pull their weight.

The truth is, cheap seeds often mean compromised genetics—lower resin production, poor mold resistance, and inconsistent phenotypes. You're not just losing grams; you're losing confidence in your grow. That frustration when your plant stretches too much, gets hit by mildew, or barely fills a jar? It’s avoidable.

Fastberry Auto changes the game. Bred for speed, resilience, and flavor, it delivers top-shelf quality without the fuss. With up to 500 g/m² indoors and rock-solid resistance to cold and humidity, this strain earns its place in your next grow—whether you're in a closet or a greenhouse. It’s not just fast; it’s reliable, rewarding, and packed with that lip-coating blueberry goodness you crave.

What Fastberry Auto Brings to Your Grow Room

Fastberry Auto turns your limited space into a high-output operation. In just 9 weeks, you’ll harvest dense, trichome-covered buds with magenta hues and a fragrance that fills the room. Its compact size (0.70–1.10 m / 2.30–3.61 ft) makes it perfect for stealth grows, while its resistance to cold and wet conditions means it thrives even in less-than-ideal climates. Whether you're running a SOG setup or growing outdoors in Europe, this strain maximizes results with minimal input.

Size, Speed, and Resilience

Fastberry Auto is built for efficiency. From germination to harvest, it takes just 9 weeks, making it ideal for quick turnover or multiple outdoor cycles per year. Its structure stays compact with short internodal spacing, but don’t let the size fool you—this plant produces heavy yields when grown in optimal conditions.

• Type: Autoflowering – no light cycle changes needed, perfect for beginners.
• Genetics: Blueberry autoflowering – a terpene-rich descendant of legendary genetics.
• Height: 70–110 cm (2.30–3.61 ft) – stays discreet and manageable.
• Flowering time: 9 weeks – fast finish without sacrificing quality.
• Yield: 400–500 g/m² indoors (1.3–1.6 oz/ft²) – excellent for its size.
• Resistance: High tolerance to cold and wet climates – ideal for outdoor growers in temperate zones.
• Smell: Strong – expect a sweet, fruity aroma; consider a carbon filter if needed.

Why Fastberry Auto Offers Exceptional Value

• Up to 19% THC – delivers a powerful, relaxing high perfect for evening use.
• Dense, purple buds – visually stunning and rich in trichomes.
• Sweet blueberry flavor – smooth, fruity smoke that lingers on the lips.
• Easy to grow – forgiving of beginner mistakes and resistant to stress.
• High mold resistance – stays healthy even in humid environments.
• Consistent performance – 100% female seeds ensure no wasted space.
• Multiple harvests per year – plant up to 4 times annually in sunny climates.

Pro Tips to Maximize Your Fastberry Auto Yield

Get the most out of your Fastberry Auto with these expert-backed strategies. Avoid common pitfalls and unlock its full potential—without overspending or overcomplicating your setup.

• Use a 20L pot or larger to encourage maximum height and yield.
• Run a 20/4 light cycle for better yields than 18/6.
• Plant closely in a Sea of Green (SOG) to maximize space efficiency.
• Avoid topping or aggressive pruning—autoflowers don’t recover well.
• Feed lightly—this strain performs best with moderate nutrients.

Technical specifications

• Breeder / Brand: FastBuds
• Type: Autoflowering
• Dominance: Indica 65% / Sativa 35%
• Genetics: Blueberry autoflowering
• Total cycle: 9 weeks (germination to harvest)
• Indoor yield: 400–500 g/m² (1.3–1.6 oz/ft²)
• Outdoor yield: 50–200 g/plant (1.76–7.05 oz/plant)
• Indoor height: 70–110 cm (2.30–3.61 ft)
• Outdoor height: 70–110 cm (2.30–3.61 ft)
• Difficulty: Low – ideal for beginners
• Structure: Compact with short internodes, central cola, and lateral branching
• Climate tolerance: Cold, wet, and temperate climates
• Resistance: High resistance to cold, humidity, and mold
• Training: Suitable for LST and SCROG; avoid topping
• Recommended pot: 18–27 L for autos
• Light cycle: 18–20 hours daily (entire cycle)
• Temperature: 22–26 °C (veg), 20–25 °C (flowering)
• Humidity: 60–70% (seedling), 50–60% (veg), 40–50% (flowering)
• pH: 6.0–6.5 (soil), 5.8–6.2 (coco/hydro)
• THC: Up to 19%
• CBD:
• Aromatic profile: Myrcene, limonene, pinene – rich in berry and floral notes
• Flavour: Ripe blueberries, floral, creamy funk
• Effect: Relaxed, sleepy, happy – ideal for nighttime use

How to Grow Fastberry Auto Successfully

Fastberry Auto thrives with simple, consistent care. Follow these steps to ensure a smooth grow from seed to harvest.

Quick overview: Autoflowering · FastBuds · 9-week cycle · Low difficulty · Ideal for indoor, outdoor, and greenhouse.

Safe start: Germinate in a moist environment at 22–25 °C. Transplant carefully once the taproot is ~1 cm long. For a stronger start, Root It 150ml – Rooting gel boosts early root development and reduces shock.

Stable seedling: Keep humidity at 60–70% and provide gentle light. Water lightly and ensure good drainage. A well-aerated soil mix prevents root rot and supports healthy growth.

Directed growth: Maintain a 20/4 light cycle. Use a 20L pot to allow full development. Avoid heavy defoliation—this strain grows fast and recovers slowly from stress.

Flowering by stages: In weeks 3–4, preflowers appear. By week 7–8, buds begin bulking up. Keep RH at 40–50% and increase airflow to prevent mold. In mid-flowering, Dutch Formula Bloom 2 enhances resin production and flower density.

Harvest, drying and curing: Harvest when trichomes are mostly milky with some amber for a relaxing effect. Flush 7–10 days before harvest. Dry at 18–22 °C and 50–60% RH for 7–10 days, then cure in jars for 2–4 weeks to develop flavor.

Frequently Asked Questions

How long does Fastberry Auto take to harvest?

From seed to harvest, Fastberry Auto takes approximately 9 weeks. Some phenotypes may be ready as early as week 8, but waiting until week 9 ensures maximum yield and potency.

Is Fastberry Auto good for beginners?

Absolutely. With low difficulty, high resistance to stress, and no need for light cycle changes, it’s one of the most beginner-friendly autoflowers on the market.

Can I grow Fastberry Auto outdoors in a cold climate?

Yes. This strain is highly resistant to cold and wet conditions, making it perfect for outdoor grows in temperate or short-summer regions.

What size pot should I use for Fastberry Auto?

Use a 18–27L pot to allow full development. Smaller pots (under 10L) will keep the plant shorter but may reduce yield.

Does Fastberry Auto need a lot of nutrients?

No. This strain performs best with moderate feeding. Overfeeding can lead to nutrient burn and reduce flavor quality.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve tested dozens of autoflowers, but Fastberry Auto stands out for its consistency and flavor. I grew it in a 20L pot under a 600W LED with a 20/4 cycle, and it stayed under 1.10 m while packing on dense, purple-laced buds. The smell during flowering was unreal—like walking into a blueberry orchard.

What impressed me most was its resilience. I ran a SOG setup with 9 plants per m², and even with tight spacing, airflow was sufficient thanks to its compact structure. I harvested 480 g/m² after 9 weeks, dried slowly, and cured for 3 weeks. The smoke is smooth, deeply relaxing, and perfect for unwinding after a long day. If you want a strain that delivers on every level—flavor, yield, and ease—this is it. My only tip? Don’t top it. Let it do its thing, and you’ll be rewarded.