Rainbows Feminized Seeds – BSF Seeds Zkittlez S1 · Sweet Candy Flavor & High Yields

Rainbows by BSF Seeds is an elite feminized cannabis strain derived from a self-pollinated USA Zkittlez clone, designed to deliver massive yields of purple, resin-drenched buds with an intensely sweet candy flavor.

It is incredibly frustrating when your cannabis harvests change every single time, leaving you with different potencies, unpredictable flavors, and irregular yields that make it impossible to plan your sessions.

That lack of consistency drains your confidence as a grower, making you second-guess your nutrients and lighting while wasting months of hard work trying to figure out why your buds don't taste or hit like they did last time.

Rainbows steps in as the ultimate genetic stabilizer, offering a reliable S1 self-pollination that guarantees those sought-after Zkittlez traits—vibrant colors, heavy resin, and a predictable, deeply relaxing effect—harvest after harvest.

Why Rainbows helps you get more consistent results

This strain brings unparalleled stability to your grow tent thanks to its S1 genetics, meaning it is a self-pollinated version of an elite clone. By crossing the original Grape Ape and Grapefruit lineage with itself, BSF Seeds locked in the exact traits that made Zkittlez famous.

Its mostly indica structure features short internodal spacing, which makes it incredibly easy to manage indoors. You won't have to worry about wild, unpredictable stretching during the flowering phase, allowing you to repeat the same environmental conditions and canopy management techniques with pinpoint accuracy every single run.

Factors that influence the result and how to control them better

• Pot size and spacing: Using 7 L (1.85 US gal) pots allows you to fit exactly 16 plants per 1 m² (10.76 ft²), standardizing your canopy space.
• Light penetration: Because of its large leaves, performing a timely defoliation ensures the lower buds develop just as densely as the top colas.
• Nutrient uptake: Feeding with organic fertilizers enhances the sweet candy terpene profile, making the flavor consistently intense.
• Vegetative time: Sticking to a strict 3-week veg period indoors prevents overgrowth and keeps the final height perfectly uniform.
• Harvest timing: Chopping exactly at the 8-week mark indoors guarantees that perfect balance of physical relaxation and mental tranquility.

Recommended routine to achieve good results every time

1. Prepare your space: Clean your grow tent and set up your 1 m² (10.76 ft²) area with proper ventilation to handle dense foliage.
2. Start strong: Germinate your seeds and transplant them into their final 7 L (1.85 US gal) containers to minimize root stress.
3. Shape the canopy: Apply the Lollipop technique right before flipping to 12/12 to focus all the plant's energy on the main colas.
4. Check the colors: Monitor the temperature drops during late flowering to consistently bring out those beautiful pink and purple hues.
5. Make small adjustments: If the canopy gets too thick, remove a few fan leaves to improve airflow and prevent moisture buildup.
6. Record your feed: Keep a log of your organic nutrient doses so you can replicate that exact mouth-watering candy flavor on your next run.

Advantages and benefits of that consistency

• More confidence: Knowing exactly how the plant will stretch and yield takes the anxiety out of your growing cycle.
• Less waste: Uniform bud development means fewer airy, unusable lower flowers and more top-shelf stash.
• Faster learning: A stable genetic baseline allows you to see exactly how your environmental tweaks affect the final product.
• Total control: You will feel like a master grower, steering the plant's growth rather than just hoping for the best.
• Reliable relief: For medicinal users, a consistent cannabinoid profile ensures the same muscle relaxation and anxiety relief every time.

Technical specifications

• Breeder: BSF Seeds
• Type: Feminized
• Dominance: Mostly Indica
• Genetics: Zkittlez S1 (Grape Ape × Grapefruit)
• Flowering (Indoor): 8 weeks
• Harvest (Outdoor): Early October (Northern Hemisphere) / First week of April (Southern Hemisphere)
• Yield (Indoor): > 500 g/m² (1.64 oz/ft²)
• Yield (Outdoor): > 700 g/plant (24.69 oz/plant)
• Height (Indoor): approx. 0.80–1.10 m (2.62–3.61 ft)
• Height (Outdoor): approx. 1.50–2.00 m (4.92–6.56 ft)
• Difficulty: Medium
• Ideal climate: Temperate, Mediterranean
• Recommended pot: 7 L (1.85 US gal) indoors
• Aromatic profile: Sweet candy, fruity, acidic touch
• Effect: Deep physical and mental relaxation, narcotic in high doses

Advice on how to grow Rainbows

Preparation and Start: This indica-dominant hybrid thrives in a well-aerated substrate. Start your seeds in a warm, humid environment.

• Keep seedling humidity around 60–70%.
• Use a light soil mix to encourage rapid root expansion.
• Transplant early to avoid stunting the taproot.

Vegetative Stage: With its short internodes, this plant stays bushy. A solid nitrogen base is key here.

• Maintain temperatures between 22–26 °C (71.6–78.8 °F).
• To ensure explosive and green growth, Top Veg Top Crop keeps the structure compact and vigorous.
• Plan for exactly 3 weeks of vegetative time indoors.

Flowering Phase: The magic happens fast. Expect dense, heavy buds that require good airflow.

• Drop humidity to 40–50% to protect the dense colas.
• Apply the Lollipop technique to remove shaded lower growth.
• For maximum resin and density, adding Big Bud Powder Advanced Nutrients will push your yields to the limit.

Harvest and Curing: Timing is everything to capture that sweet candy essence.

• Flush the roots 10 days before harvest for a cleaner ash.
• Dry slowly at 18–22 °C (64.4–71.6 °F) to preserve the purple hues.
• These Feminized seeds reward a 3-week cure with an unforgettable flavor.

Frequently Asked Questions

What should I do if the colors aren't turning purple?

Don't panic! The purple and pink hues usually express themselves during the late flowering stage. To encourage this, try lowering your nighttime temperatures by a few degrees during the final two weeks of bloom.

How do I know if I'm defoliating correctly?

Focus only on the large fan leaves that are blocking light from reaching the lower bud sites. If you can see the light hitting the middle of the plant, you've done enough. Never strip more than 20% of the foliage at once to avoid stressing the plant.

How can I adjust the feeding without burning the plants?

Always start with half the recommended dose of your organic nutrients and observe the leaf tips. If they stay green and pointing up, you can gradually increase the dose. If you see slight burning, simply water with plain, pH-adjusted water for the next feeding.

Personal Experience of Pevgrow’s CEO (Alan)

I've tested countless Zkittlez crosses over the years, but finding one that delivers the exact same mouth-watering candy flavor run after run is rare. That's why I value the consistency of Rainbows so much. In my own indoor setups, I need to know exactly how a plant will behave so I can dial in my environment perfectly, and this S1 genetic never throws me any curveballs.

I usually run these beauties in a Sea of Green setup, packing them into 7 L (1.85 US gal) pots. By keeping the veg time short and doing a heavy Lollipop prune right before the flip, I've found the absolute "sweet spot" for this strain. The canopy stays perfectly even, and the resin production is off the charts. It's a routine I can reproduce over and over again, always resulting in jars full of dense, purple, candy-scented nugs that are perfect for chilling out after a long day at the office.