Critical Sour Feminized Seeds · Fast-Flowering Indica Hybrid with Sour Fruit Punch

Critical Sour Feminized Seeds by Female Seeds are a powerhouse indica-dominant hybrid designed for growers who refuse to compromise between speed, yield, and potency. This strain delivers thick, resin-drenched buds on a robust, easy-to-manage plant, making it a reliable cornerstone for any garden seeking a fast and fruitful finish.

Ever feel like your outdoor harvest is a gamble with the weather? You wait all season, only to have autumn rains or early frost threaten your precious buds right at the finish line. That constant anxiety, watching the calendar and the sky, can turn the joy of growing into a stressful race against time. It’s frustrating to put in months of work for a harvest that’s compromised or, worse, lost.

Critical Sour is your solution to the unpredictable outdoor clock. Bred for early maturation, this strain is engineered to finish its flowering cycle swiftly, often ready for harvest by the beginning of September in many climates. This means you can avoid the late-season pitfalls of mold and cold, securing your yield with confidence. It’s the dependable performer that turns uncertainty into a predictable, potent payoff.

Why Critical Sour Delivers Rock-Solid Consistency

This strain’s reliability stems from its rock-solid genetic foundation and predictable growth pattern. It’s not a finicky diva; it’s a workhorse built for results.

The plant develops a compact, sturdy structure with wide internodes, which not only supports its heavy buds but also promotes excellent airflow to keep mold at bay. Its impressive flower-to-leaf ratio means less trimming for you and more focus on bud production. Whether indoors under controlled lights or outdoors battling the elements, Critical Sour shows remarkable resistance, sticking to its schedule and delivering the goods without drama.

Key Factors for Your Best Harvest & How to Control Them

• Light Schedule: Indoors, stick to the classic 12/12 flip to trigger flowering. Outdoors, its genetics are tuned to finish early, capitalizing on the late summer sun.
• Feeding: It’s a hardy feeder but thrives on consistency. Start with a balanced vegetative nutrient and switch to a bloom booster rich in phosphorus and potassium as flowers form. Avoid drastic nutrient swings to keep growth steady.
• Environment: While resistant, it performs best in a warm, Mediterranean-like climate. Ensure good airflow around the canopy, especially in the final weeks, to protect those dense buds.
• Training: Its strong, flexible stems respond well to Low-Stress Training (LST) to open up the canopy and maximize light penetration for even bigger yields.
• Watering: Let the soil dry out slightly between waterings. Overwatering is a more common mistake than underwatering with this robust plant.
• Harvest Timing: Watch the trichomes. Harvest when most are milky white for a potent, energetic high; wait for more amber tones for a heavier, couch-locking effect.

A Simple Routine for Repeatable Success

1. Germinate & Start Strong: Use the paper towel method or plant directly in a light seedling mix. A product like Root It rooting gel can give your seedlings a vigorous head start.
2. Establish in Veg: Transplant into a final pot of at least 11–20 L (2.9–5.3 gal) for photoperiod plants. Maintain 18-24°C (64-75°F) and 60-70% RH. Begin a gentle feeding schedule with a balanced grow formula.
3. Train for Structure: Around week 3-4, gently bend and tie down main stems (LST) to create an even canopy. This simple step dramatically increases your yield sites.
4. Flip to Flower & Support: Switch lights to 12/12 (indoors). As buds swell, consider using a bloom enhancer like Green Sensation by Plagron to boost density and resin production. Lower humidity to 40-50%.
5. Monitor & Flush: In the last 10-14 days, stop feeding and flush with plain, pH-balanced water. This clears excess nutrients for a cleaner, smoother final smoke.
6. Harvest with Precision: Use a jeweler’s loupe to check trichome maturity. Cut, dry slowly in a dark space at 18-22°C (64-72°F) and 50-60% RH, then cure for optimal flavor.

The Tangible Benefits of a Predictable Grow

• Confidence, Not Guesswork: Know roughly when you’ll harvest, allowing you to plan your time and space.
• Maximized Yield Potential: Its structure and genetics are optimized to convert light and nutrients into heavy buds efficiently.
• Reduced Risk: Early finish means avoiding the worst of the fall weather, drastically lowering the chance of mold or bud rot.
• Easier Management: The predictable growth pattern and strong resistance make it forgiving for less experienced growers.
• Consistent Quality: Batch after batch, you can expect the same satisfyingly potent effects and sharp, fruity flavors.

Frequently Asked Questions

Is Critical Sour good for beginner growers?

Absolutely. Its high resistance to disease and pests, combined with a forgiving nature and straightforward feeding needs, makes it an excellent choice for those starting their growing journey.

How do I know if I’m overwatering my Critical Sour plants?

The plant will tell you. Drooping, yellowing lower leaves and a general lack of vigor are key signs. Always check that the top few centimeters of soil are dry before watering again. A light pot is a thirsty pot.

Can I grow Critical Sour indoors if I don’t have an outdoor space?

Yes, it performs very well indoors. Its compact height of 0.80–1.40 m (2.6–4.6 ft) makes it suitable for most tents. Just ensure you have good ventilation and powerful enough lights to satisfy its high-yield potential.

What’s the best way to enhance the sour fruit flavors?

Flavor is heavily influenced by a proper dry and cure. After harvest, dry slowly, then cure the buds in airtight jars, burping them daily for the first few weeks. Stress-free growing and a final flush also contribute to a cleaner, more pronounced terpene profile.

Technical Specifications

• Breeder / Brand: Female Seeds
• Type: Feminized Photoperiod
• Dominance: Indica Dominant Hybrid
• Genetics: (Maroc x Grapefruit) x (Auto NL x Auto NL x Auto Critical)
• Indoor Flowering Time: 56–63 days
• Outdoor Harvest: Ready by early September (Northern Hemisphere)
• Indoor Yield: 300–450 g/m² (approx. 0.97–1.45 oz/ft²)
• Outdoor Yield: 180–250 g/plant (approx. 6.35–8.82 oz/plant)
• Indoor Height: 0.80–1.40 m (2.62–4.59 ft)
• Outdoor Height: 1.00–2.50 m (3.28–8.20 ft)
• Difficulty: Low to Medium
• Recommended Climate: Temperate to Mediterranean; resistant to mold and adverse weather.
• THC Level: High (Approx. 18-22%)
• CBD Level: Low
• Aromatic Profile: Dominant sour citrus and grapefruit notes, backed by earthy, spicy undertones.
• Effect: Potent, relaxing body high coupled with an uplifting, happy cerebral effect. Ideal for evening relaxation.

Personal Experience of Pevgrow’s CEO (Alan)

I’ve run Critical Sour in our test gardens for several seasons, both outdoors and in a controlled environment, and it’s become a go-to for reliability. What strikes me first is its sheer vigor. From a robust seedling, it rockets into a bushy, strong-stemmed plant that feels unstoppable. Outdoors, it’s a champion of the early finish. While other strains are still stretching in late August, Critical Sour is already packing on weight, letting me harvest worry-free before the autumn dampness sets in.

The real magic happens in the last three weeks of flowering. The buds swell dramatically, becoming rock-hard and absolutely caked in frosty trichomes. The aroma shifts from a generic green smell to this intense, sharp sour fruit punch that fills the room. For indoor growers, I strongly recommend implementing some form of SCROG (Screen of Green) training. Its wide node spacing and strong branches are perfect for it, and you’ll easily maximize your light coverage for even bigger colas.

My pro-tip? Don’t be shy with support in late flower. Those branches will bend under the weight of the buds. A little staking goes a long way in preventing snap. The smoke is exactly as advertised: a powerful, relaxing indica stone that melts stress without knocking you out completely, all wrapped up in that delicious sour grapefruit flavor. It’s a consistent performer that makes you look like a pro, season after season.