Kryptonite Fast Feminized Seeds by Pyramid Seeds – Sativa Power with 53-Day Flowering

Kryptonite Fast feminized seeds by Pyramid Seeds are your express ticket to a powerful sativa experience, delivering intense cerebral effects and top-tier yields in just over seven weeks of flowering.

Worried your grow won’t be ready in time — or that you’ll mess up with a fast strain? You’re not alone. Many growers hesitate to try fast-flowering sativas, fearing they’ll underperform or be too finicky to handle.

That anxiety keeps you stuck in trial mode — planting the same slow strains, missing harvest windows, or worse, letting your seeds gather dust while you overthink the details. You want something bold and fast, but you don’t want to gamble on quality or potency.

With Kryptonite Fast, you get the best of both worlds: the full psychedelic punch of a pure sativa and the speed of a modern fast-flowering photoperiod. This isn’t a compromise — it’s a breakthrough. Bred by Pyramid Seeds using elite sativa and autoflowering genetics, it’s designed to thrive with minimal fuss and maximum reward.

What to Expect in Your First Few Weeks

At first, Kryptonite Fast grows with a slight stretch, showing its sativa soul. Don’t panic if it looks lanky early on — that’s normal. The real magic starts around week 3, when branching kicks in and the plant begins stacking nodes tightly. You’ll notice vibrant green leaves and a strong central cola forming. By the end of veg, it’ll have a sturdy, open structure perfect for light penetration.

Flavor and aroma develop early too — expect a zesty citrus punch with earthy pine undertones. This isn’t just smell — it’s a preview of the terpene-rich experience waiting at harvest.

Common Mistakes and How to Avoid Them

• Overfeeding during stretch — start low and increase nutrients gradually to avoid burn.
• Skipping pre-training — gently tie down branches before flowering to maximize yield.
• Ignoring humidity — keep RH at 50–60% in veg to prevent mold in dense buds.
• Harvesting too early — wait for milky-to-amber trichomes for full cerebral effect.
• Using small pots — go for at least 11 L (2.9 gal) to support its vigorous growth.

How to Fine-Tune for Your Perfect Harvest

1. Start with a stable seedling in a well-aerated substrate.
2. Switch to 12/12 lighting to trigger flowering after 3–4 weeks of veg.
3. Monitor trichome development weekly using a handheld microscope.
4. Adjust nutrient strength based on leaf color — light green means it’s time to feed.
5. Flush with plain water 7–10 days before harvest for a smoother smoke.
6. Experiment with drying time — slower cure (3 weeks) enhances flavor.

Advantages of Mastering a Fast-Flowering Sativa

• More harvests per year, especially in outdoor setups.
• Greater confidence in your growing skills with each cycle.
• Higher control over flavor and potency through tuning.
• Less energy and time investment per grow.
• Better adaptation to changing climates or indoor schedules.

Technical specifications

• Breeder / Brand: Pyramid Seeds
• Type: Feminized photoperiod (fast flowering)
• Dominance: 80% sativa / 20% indica
• Genetics: Original sativa × selected autoflowering strains
• Indoor flowering time: 53–58 days (LED)
• Outdoor harvest: Mid-September (Northern Hemisphere)
• Indoor yield: 800–950 g/1.5 m² (28.2–33.5 oz/1.6 ft²)
• Outdoor yield: 0.5–1.5 kg/plant (1.1–3.3 lb/plant)
• Indoor height: 0.80–1.10 m (2.62–3.61 ft)
• Outdoor height: 1.20–1.80 m (3.94–5.91 ft)
• Difficulty: Moderate
• Structure: Sturdy, open branching, medium internodal spacing
• Resistance: High resistance to fungi and pests
• Training: Suitable for LST, SCROG, and light defoliation
• Recommended pot: 11–20 L (2.9–5.3 gal) depending on space
• THC: 21–23%
• CBD: Low
• Aromatic profile: Citrus, pine, earth, spice
• Effect: Cerebral, euphoric, psychedelic — ideal for evening creativity

How to Grow Kryptonite Fast Feminized Seeds

Get the most out of your Kryptonite Fast grow with this expert-backed plan tailored to its sativa speed and vigor.

Quick overview: Fast-flowering photoperiod from Pyramid Seeds — 53–58 days to harvest, moderate difficulty, ideal for indoor or outdoor in warm climates.

Safe start: Germinate in a moist, dark environment at 22–25 °C. Transplant once the taproot is ~1 cm (0.4 in). For faster rooting, Clonex Rooting Hormone Gel boosts early root mass and reduces shock.

Directed growth: Use 18/6 light cycle in veg. Keep substrate well-drained. Train early with LST to build a flat canopy. Substrat Complete Mix Top Crop 50L provides balanced aeration and nutrient retention for strong development.

Flowering support: Switch to 12/12 to trigger bloom. Maintain RH at 40–50% to protect dense buds. Support heavy colas with stakes. Add bloom boosters like Top Bud during peak flowering for increased resin and density.

Harvest readiness: Check trichomes weekly. Harvest when 70% are milky and 30% amber for a balanced, uplifting high. Flush 7–10 days prior using plain water to improve taste.

Frequently Asked Questions

How long does it take to master growing Kryptonite Fast?

Most growers feel confident by their second cycle. The first grow teaches you its rhythm — fast stretch, early flowering, and high response to training.

How do I know if I’m harvesting at the right time?

Use a 60x loupe to check trichomes. Milky = energetic high. Milky-to-amber = more balanced. Avoid clear trichomes — it’s too early.

What if I don’t like the cerebral effect?

The sativa dominance means an uplifting experience. If you prefer body highs, try pairing it with an indica strain or microdose for daytime clarity.

Can I grow this outdoors in a cooler climate?

Yes, but aim for a sheltered spot with full sun. Its mold resistance helps, but avoid wet autumns. Harvest by mid-September to beat the rain.

Personal Experience of Pevgrow’s CEO (Alan)

I was skeptical at first — a fast sativa that actually delivers? But after growing Kryptonite Fast in our test room, I was blown away. The first thing I noticed was the speed: from switch to harvest in 53 days under 720W LED. The buds were dense, frosty, and smelled like a citrus grove on fire.

My biggest mistake? I topped it too late — around day 5 of flowering. It recovered, but I lost a week of vertical growth. Now I recommend only LST and light defoliation. The real game-changer was using a bloom booster during weeks 4–6. The trichome production went through the roof. This is now my go-to for quick-turnaround test grows and creative evening sessions.