Red Mandarine F1 Fast Version by Sweet Seeds – Fast-Flowering Photoperiod with Exotic Citrus Aroma and Red Flowers

Red Mandarine F1 Fast Version by Sweet Seeds is a photoperiod feminized strain that bursts into vibrant red flowers and floods your grow space with an intense mandarin-citrus aroma, delivering up to 500 g/m² in just 7–8 weeks of flowering.

Struggling with slow, bland, or unstable genetics?

Maybe you’ve tried strains that take forever to finish, lack flavor, or collapse under their own weight. You’re not asking for much—just a fast, reliable plant with serious taste and eye-catching beauty. But too many 'fast' strains sacrifice quality for speed, leaving you with weak highs and forgettable aromas.

What if your next grow could be both fast AND exceptional?

Imagine harvesting dense, resinous buds in under two months, with a terpene profile so vivid it fills the room with mandarin zest and cypress freshness. Picture your plants turning deep red hues, like a sunset in your grow tent. That’s not a dream—it’s what Red Mandarine F1 Fast Version delivers.

Red Mandarine F1 Fast Version: Speed, color, and citrus power in one elite strain

This photoperiod gem from Sweet Seeds combines the rapid flowering of the F1 Fast Version® line with the legendary Tangie terpene profile and the stunning red pigmentation of the Red Family. The result? A strain that finishes in 7–8 weeks, produces up to 500 g/m², and develops breathtaking red calyxes in 80% of phenotypes. With a THC level of 17–20%, it offers a balanced high—relaxing enough to unwind, stimulating enough to spark creativity. Whether you're chasing top-shelf extractions or just want a flavorful daily smoke, this strain delivers on every front.

If you’re just starting out: how this strain makes your first grow a success

Don’t worry—this isn’t a finicky diva. Red Mandarine F1 Fast Version is forgiving, stable, and grows evenly, making it perfect for beginners. It handles minor mistakes in watering or nutrients and still delivers solid results. Its compact size and short flowering time mean you’ll see rewards fast, keeping you motivated.

• Stable growth with minimal stretching—easy to manage in small spaces
• Forgives common beginner errors in feeding and pH
• Short flowering time means faster feedback and learning
• Resistant to mold and pests—less stress, more chill
• Produces high-quality buds even with basic setups

If you already have experience: why this strain deserves a spot in your rotation

For advanced growers, this strain is a precision tool. Its genetic stability allows for aggressive training like SCROG or topping, and its rapid flowering makes it ideal for back-to-back grows. The intense terpene profile and red trichomes make it a standout for extracts and photography.

• Excellent response to LST and SCROG—maximize yield in limited space
• Consistent phenotypes—no more guessing games
• Perfect for fast-turnaround commercial or personal harvests
• Exceptional terpene expression—ideal for live resin or rosin
• Stunning red calyxes—win photo contests and impress friends

Advantages and benefits for any level

• Flowers in just 7–8 weeks—get your harvest faster than most photoperiods
• Produces 400–500 g/m² indoors—high yield without massive plants
• Intense mandarin-citrus aroma with cypress freshness—sensory delight
• 80% of plants develop red calyxes—unique visual appeal
• Balanced 55% indica / 45% sativa effect—creative yet relaxed
• Resilient structure—handles wind and heavy buds outdoors
• Easy to dry and cure—smooth smoke, no harshness
• Great for extractions—rich in red trichomes and aromatic oils

Typical mistakes this strain helps you avoid

Even the best growers make mistakes. But Red Mandarine F1 Fast Version’s hybrid vigor and stability help you dodge common pitfalls that ruin harvests.

• Overcomplicating the grow: Its stability means fewer adjustments and less stress
• Waiting too long to harvest: Clear finish window at 7–8 weeks keeps you on track
• Low yields from slow strains: High output in minimal time maximizes efficiency
• Boring flavors: Intense terpenes guarantee a memorable smoke every time
• Plant collapse: Strong stems support dense, resinous colas

Technical specifications

• Breeder / Brand: Sweet Seeds
• Type: Feminized photoperiod
• Dominance: 55% Indica / 45% Sativa
• Genetics / Cross: Red Poison Auto® (SWS39) × Tangie (California Orange x Skunk)
• Indoor Flowering: 7–8 weeks
• Outdoor Harvest: Mid to late September (Northern Hemisphere)
• Indoor Yield: 400–500 g/m² (13.23–16.53 oz/ft²)
• Outdoor Yield: 350–550 g/plant (12.35–19.40 oz/plant)
• Indoor Height: 60–90 cm (23.62–35.43 in)
• Outdoor Height: 1.10–1.40 m (3.61–4.59 ft)
• Difficulty: Low
• Structure and Vigour: Strong, flexible branches; short internodal distance; high hybrid vigor
• Ideal Climate: Temperate, Mediterranean; tolerates mild humidity
• Resistance: Good resistance to mold, pests, and water stress
• Training: Excellent for LST, topping, FIM, defoliation, and SCROG
• Recommended Pot: 11–20 L depending on space and setup
• Light: 18/6 in veg, 12/12 in flowering
• 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)
• Smell in Grow: High—use a carbon filter in enclosed spaces
• THC: 17–20%
• CBD: 0.1%
• Aromatic Profile: Limonene, myrcene, pinene—dominant citrus and cypress notes
• Flavour: Sweet mandarin, citrus, fresh cypress, subtle earthiness
• Effect: Balanced—relaxing body buzz with uplifting cerebral stimulation, ideal for daytime or evening use

How to grow Red Mandarine F1 Fast Version for maximum results

Get the most out of this fast, colorful strain with a simple, effective grow plan tailored to its genetics.

Quick overview

Feminized photoperiod from Sweet Seeds, flowering in 7–8 weeks, low difficulty, ideal for indoor and outdoor in temperate climates.

Safe start

Begin strong with healthy germination and early root development.

• Germinate seeds in moist paper towels at 22–25 °C
• Transplant carefully when the taproot is 1–2 cm long
• Use airy, well-draining soil to prevent damping off
• For faster rooting, try Root Stimulator de B.A.C

Directed growth

Guide your plant for even canopy and maximum light exposure.

• Use 18/6 light cycle in vegetative stage
• Pot early into 11–20 L containers to avoid stress
• Apply Alga Grow Plagron for organic vigor and green leaves
• Train with LST or topping to build multiple colas
• Keep humidity at 50–60% and temperature at 22–26 °C

Efficient flowering

Switch to 12/12 and support heavy, resinous bud development.

• Change to 12/12 light cycle when desired height is reached
• Expect red calyxes to appear by week 3 of flowering
• Reduce humidity to 40–50% to prevent mold
• Boost resin and density with Brutal Buds in mid-flowering
• Monitor trichomes—harvest when mostly milky for balanced effect

Harvest, drying and curing

Finish strong for smooth, flavorful, and potent buds.

• Flush with plain water 7–10 days before harvest
• Cut large fan leaves and hang plants upside down
• Dry at 18–22 °C and 50–60% RH for 7–10 days
• Cure in glass jars, opening daily for first week
• Enjoy smoother smoke and enhanced flavor after 2–4 weeks

Frequently Asked Questions

What makes Red Mandarine F1 Fast Version different from autoflowers?

Unlike autoflowers, this is a photoperiod strain, meaning you control the switch to flowering with light. This allows for longer veg if desired, but it still finishes fast—just 7–8 weeks—thanks to its F1 Fast Version® genetics.

Do all plants turn red?

Approximately 80% of plants develop red calyxes, especially under cooler nighttime temperatures in late flowering. It’s not guaranteed, but highly likely with proper conditions.

Is it good for extractions?

Absolutely. Its high trichome production and unique red pigmentation make it ideal for solventless extracts like rosin or dry sieve, resulting in colorful, aromatic concentrates.

Can I grow it outdoors in a colder climate?

Yes, it’s resilient and handles mild cold, but it thrives best in temperate to Mediterranean climates. Harvest is mid to late September in the Northern Hemisphere.

How can I maximize the citrus aroma?

Use organic nutrients, avoid overfeeding, and ensure proper drying and curing. Terpene preservation starts at harvest—don’t rush the process.

Personal Experience of Pevgrow’s CEO (Alan)

I first grew Red Mandarine F1 Fast Version when Sweet Seeds launched it, and it immediately became a staple in my rotation. For beginners, I recommend it because it’s nearly bulletproof—forgives late watering, minor pH swings, and even clumsy topping. I’ve seen new growers nail it on their first try. For experts, it’s a beast in the SCROG setup. I trained one plant across a 60x60 cm screen, and it yielded over 480 grams of dense, red-tinged buds. The aroma during flowering is unreal—like peeling a mandarin in a pine forest. I always use a carbon filter. When it comes to harvest, I wait until about 20% of trichomes turn amber for a more relaxing high. Dried slowly and cured in jars, the smoke is smooth, flavorful, and hits just right—creative but not overwhelming. It’s one of those rare strains that’s easy for rookies and respected by veterans. I keep it in my garden year after year, and I always recommend it to friends, whether they’re growing for flavor, color, or fast results.