Black Rainbow© Feminized Seeds by Seed Stockers – Fruity Indica Hybrid with 20-26% THC

Black Rainbow© Feminized Seeds by Seed Stockers deliver a powerhouse indica-leaning hybrid that transforms your grow space into a sensory paradise, offering sky-high THC levels of 20–26% and impressively generous yields in just 8 to 9 weeks of flowering.

Struggling to find a strain that balances flavor, potency, and yield?

Most high-THC varieties force you to choose: amazing taste or massive buds. Others take forever to finish, tying up your setup. And let’s be real—some just don’t live up to the hype, leaving you with weak effects and bland smoke.

Imagine waiting weeks only to be disappointed by dull flavors and mediocre resin?

You invest time, energy, and space into your grow, only to harvest buds that smell like hay and taste like nothing. Or worse—your plant stretches too much, molds in humidity, or barely produces. That frustration kills the joy of growing. You deserve a strain that rewards your effort with bold aromas, crystal-covered colas, and a truly memorable high.

Black Rainbow© delivers a full-spectrum experience without the wait

This feminized gem from Seed Stockers blends Watermelon Zkittlez, Bacio Rainbow, and Apollo Black Cherry into a perfectly balanced 50/50 indica-sativa hybrid. The result? Dense, frosty buds that explode with citrus—lemon, grapefruit, and orange candy—layered over spicy, earthy, and kushy diesel undertones. With THC hitting 20–26%, the effect is deeply relaxing yet mentally uplifting, perfect for unwinding without locking you to the couch. Grow it indoors or outdoors, and harvest big yields in just 8–9 weeks—ideal for intermediate growers who want quality, speed, and reliability.

What it’s like to grow Black Rainbow© solo

When you're flying solo, control is everything. Black Rainbow© gives you that. Its compact structure and predictable 8–9 week flowering let you plan your cycle with precision. You’ll love watching the trichomes turn from milky to amber, knowing you’re in charge of the high’s intensity. The manageable height—up to 1.10 m (3.61 ft) indoors—means it fits perfectly in smaller spaces, and its resistance to mold makes it forgiving if your humidity fluctuates slightly. It’s the kind of strain that makes you feel like a pro, even on your first try.

What changes when you share the harvest

Now picture passing around a joint of Black Rainbow© at a chill session. The room lights up with the sweet, spicy aroma. Everyone notices the flavor—like citrus candy dipped in diesel. The high spreads evenly: relaxed but alert, creative but grounded. Because the buds are so dense and resinous, a little goes a long way, making your stash last. Whether you’re sharing a vaporizer hit or breaking up a nug, this strain becomes the centerpiece of the moment—something everyone remembers.

Advantages and benefits in any setting

• Harvest in just 8–9 weeks—perfect for quick turnover or back-to-back grows
• Dense, frosty buds with a complex flavor: citrus candy meets spicy diesel
• High THC (20–26%) delivers a balanced, relaxing, and uplifting effect
• Indoor yields up to 500 g/m² (1.76 oz/ft²), outdoor up to 600 g/plant (21.16 oz)
• Thrives in both indoor and outdoor setups, from Mediterranean to temperate climates
• Intermediate difficulty—challenging enough to feel rewarding, forgiving enough to succeed
• Compact structure ideal for stealth grows or limited spaces

Tips for choosing how and with whom to grow it

Black Rainbow© adapts to your vibe. If you're growing for personal use, keep the vegetative phase short to maintain a compact plant. For group harvests or bigger yields, extend veg to let it stretch and branch out. Indoors, it loves a SCROG setup—Radical Flower helps boost resin production during flowering. Outdoors, plant in a sunny spot with good airflow to prevent moisture buildup. Time your harvest based on trichomes: milky for energetic relaxation, amber for deeper calm.

• Grow solo for a controlled, high-quality harvest you can fine-tune
• Share the grow with a friend—split a 5-seed pack and compare phenos
• Use for evening sessions when you want relaxation without sedation
• Perfect for creative solo time or low-key social gatherings
• Extend veg time if you want maximum yield for group use
• Harvest early for a clearer high, later for a heavier body stone

Technical specifications

• Breeder / Brand: Seed Stockers
• Type: Feminized
• Dominance: Indica / Sativa (50/50)
• Genetics: (Watermelon Zkittlez × Bacio Rainbow) × Apollo Black Cherry
• Flowering time: 8–9 weeks
• Yield (Indoor): Up to 500 g/m² (1.76 oz/ft²)
• Yield (Outdoor): Up to 600 g/plant (21.16 oz)
• Height (Indoor): 0.80–1.10 m (2.62–3.61 ft)
• Height (Outdoor): 1.20–1.80 m (3.94–5.91 ft)
• Difficulty: Intermediate
• Structure: Compact, dense branching
• Climate: Mediterranean, temperate, continental
• Resistance: Moderate resistance to mold and pests
• Training: Suitable for LST, SCROG, topping (avoid in autos)
• Recommended pot: 11–20 L depending on space
• Light: 18/6 (veg), 12/12 (flower)
• Temperature: 22–26 °C (veg), 20–25 °C (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 to high—carbon filter recommended
• THC: 20–26%
• CBD: Low (approx. 0.1–0.5%)
• Aromatic profile: Limonene, myrcene, caryophyllene
• Flavour: Citrus, sweet, spicy, earthy, diesel
• Effect: Balanced—relaxing body, uplifting mind

How to grow Black Rainbow© for maximum flavor and yield

Black Rainbow© thrives with a bit of TLC but rewards effort with massive, resinous buds. Here’s how to get the most out of it.

Quick overview: feminized · Seed Stockers · 8–9 week flower · intermediate · ideal for indoor or outdoor in sunny climates.

Safe start: germinate in a moist paper towel at 22–25 °C. Transplant carefully when the taproot is ~1 cm long. For a stronger start, Klonagel rooting hormone gel boosts root development and reduces shock.

Stable seedling: keep humidity at 60–70% and provide gentle light. Water lightly and ensure good drainage. Protection Kit Trabe Evolution helps prevent early pests and strengthens immunity.

Directed growth: switch to 18/6 light cycle. Use airy soil or coco; top early to encourage branching. Train with LST or SCROG for even canopy. Avoid overfeeding—start nutrients low and increase gradually.

Flowering by stages: switch to 12/12 to trigger bloom. In early flowering, maintain humidity at 50–60%. Mid-flower: reduce to 40–50%, add bloom boosters. Late flower: flush 7–10 days before harvest. Use Top Max BioBizz in the final weeks for denser, sweeter buds.

Harvest, drying and curing: harvest when 70% of trichomes are milky, 30% amber for balanced effect. Dry at 18–22 °C and 50–60% RH for 10–14 days. Cure in jars for 2–4 weeks, burping daily for smooth, flavorful smoke.

Frequently Asked Questions

Can I grow Black Rainbow© outdoors in a colder climate?

Yes, but it prefers warm, sunny conditions. If you're in a temperate zone, plant after the last frost and ensure it gets full sun. Its moderate mold resistance helps, but avoid wet, shady spots.

How do I maximize yield indoors?

Extend the vegetative phase slightly and use SCROG or LST to spread the canopy. Ensure strong lighting (600W+ LED/HPS) and maintain optimal climate. Avoid overwatering and nutrient burn.

Is this strain good for beginners?

It’s intermediate—best for growers with some experience. It’s not the easiest autoflower, but with proper care, it’s very forgiving and rewarding.

What does it taste like when vaped?

Vaping enhances the citrus and sweet notes, with less of the diesel harshness. You’ll taste lemon candy, ripe berries, and a creamy, spicy finish—smooth and flavorful.

How much space does it need?

Indoors, allow 60x60 cm (23.62x23.62 in) per plant. Outdoors, space 1–1.5 m (3.28–4.92 ft) apart for airflow and light penetration.

Personal Experience of Pevgrow’s CEO (Alan)

I grew Black Rainbow© last summer in my outdoor setup—full sun, Mediterranean climate. I kept it in a 15 L pot and topped it twice during veg. The plant stayed under 1.5 m (4.92 ft) but exploded in flowering, with colas so dense they needed support. The smell was insane—like citrus cleaner mixed with hash. I harvested after 9 weeks, drying slowly. The high? Perfect balance: relaxed body, clear head. I shared it with friends at a beach session—everyone asked for seeds. For indoor, I’d use SCROG and Radical Flower to push resin even further. One of the best all-around feminized strains I’ve grown.