Hybrid60% Indica / 40% Sativa22-26% THC

Rainbow Belts

Also known as: Rainbow Belt, Rainbow Belts 1.0, RB

Breeder: Archive Seed Bank

Rainbow Belts is Archive Seed Bank's flagship candy-terp cultivar, created by backcrossing Zkittlez into its own Moonbow line (itself Zkittlez-derived) to double down on the fruit-candy terpene profile while adding OG-backed structure and resin density. Released around 2017 and exploding in popularity after ThaDocta distributed genetics to roughly 50 growers in 2020, it rapidly became one of the most sought-after solventless cultivars in the US market. The strain is equally prized as a connoisseur flower jar and an elite hash-washing cut, with fresh-frozen yields of 4–6% (elite phenos pushing 6–7%). Rainbow Belts is now a prolific genetic building block, with 42+ direct descendants catalogued on SeedFinder from Archive alone. Rainbow Belts is widely considered the gold standard for solventless hash production in the Zkittlez lineage, with competition-proven hash yields exceeding 6% and 6-star full-melt quality. The 1.0 uses the Moonbow #75 male for improved structure and yield over standard Zkittlez, while subsequent versions further refine hash-making potential.

Lineage

Zkittlez x Moonbow #75

THC Range

22-26%

Flower Time

8-10 weeks

Difficulty

Moderate

Lineage & Genetics

Cross: Zkittlez x Moonbow #75

Parent strains in encyclopedia:Zkittlez→Moonbow #75→

Zkittlez is the legendary candy-terp cultivar (Grape Ape x Grapefruit) that defined the modern fruit-forward movement; it provides Rainbow Belts' signature confectionery sweetness and bright mental clarity. Moonbow #75 was hand-selected from 200 phenotypes of Archive's Moonbow line (believed to be Zkittlez x Dosidos); it contributes OG Kush-derived plant vigor, denser bud structure, improved resin production, and a gassy kush backbone that gives Rainbow Belts its potency edge over straight Zkittlez.

Lineage Dispute

Moonbow's exact genetics are unconfirmed by Archive Seed Bank but widely believed to be Zkittlez x Dosidos. Some sources (Leafly) credit Purple City Genetics as a co-breeder, though most attribute the line solely to Archive's Fletcher 'ThaDocta' Watson. The 1.0 lineage (Zkittlez x Moonbow #75) is undisputed; confusion arises from later iterations (2.0, 3.0) which use different internal selections.

Terpene Profile

DOMINANT

Limonene —

DOMINANT

Caryophyllene —

SECONDARY

Linalool —

SECONDARY

Myrcene —

SECONDARY

Humulene —

Aroma: Intensely candy-forward — fizzy lime candy, tropical fruit snacks, and sour Zkittlez sweetness layered over a gassy petrol-kush backbone. Growers report the room smelling like artificial fruit candy by week 5 of flower. The nose is loud enough to require carbon filtration. A proper 6-week cure unlocks the full confectionery depth with a sweet-tart sour finish.

Flavor: Sweet-tart lime candy and tropical fruit on the inhale, transitioning to tangy berry and grape notes mid-palate, finishing with a subtle spicy diesel undertone from the Moonbow side. Consistently described as tasting like Trix cereal or sour fruit candy. The aftertaste lingers for minutes with a sweet-tart echo and gentle peppery tingle. In solventless cold-cure rosin, the flavor scales dramatically — described as citrus gelato with a peppered finish.

Effects & Experience

Onset: Fast-hitting euphoric rush within minutes; a bright, uplifting cerebral wave that elevates mood and sparks creativity. Users describe it as mentally weightless and giggly.

The initial euphoric lift settles into a smooth, full-body relaxation without heavy couch-lock in moderate doses. Consumers report feeling happy, chatty, and socially comfortable while physically at ease. Higher doses push toward heavier sedation and a face-melting body melt. The Limonene-Linalool synergy creates a distinctive 'alert but relaxed' state that many describe as the ideal hybrid balance.

Duration: 2–3 hours; the cerebral effects taper first, leaving a gentle physical calm that can ease into sleepiness

Commonly Reported Uses

Stress reliefAnxietyInsomniaMild painDepressionAppetite stimulationEvening wind-down

Grower's Notes

Flower

8-10 weeks

Indoor Yield

400–500 g/m²

Outdoor Yield

550–700 g/plant

Difficulty

Moderate

Height / Stretch

Medium-Tall (100-130 cm)

Environment

Indoor, Outdoor, Greenhouse

Rainbow Belts is an indica-dominant hybrid from Archive Seed Bank (bred in collaboration with Purple City Genetics), created by crossing Zkittlez with Moonbow #75. Widely regarded as the 'Holy Grail' of Z-line terpene profiles, Rainbow Belts fixes the historically weak growth structure of original Zkittlez while amplifying the candy flavor to extraordinary levels. The strain has become a cornerstone in the solventless hash world, with competition-proven genetics that deliver 4-6%+ fresh-frozen wash yields. Multiple versions exist (1.0, 2.0, 3.0), each with distinct growth characteristics.

Structure and Stretch

Rainbow Belts exhibits significant stretch, typically 2x-3x after the 12/12 flip depending on version. The 1.0 (Zkittlez x Moonbow #75) has moderate stretch with medium-sized plants; the 2.0 is slightly more compact and sativa-leaning in structure; the 3.0 is a tall candelabra with the most aggressive stretch (2.5-3x). All versions require early and aggressive training. Flip to flower before the tent is full, or the height will exceed your headroom. Plant height reaches 100-130 cm indoors with training, potentially 5-8 feet if left untrained. Strong lateral branching fills the canopy when topped and trained with LST or SCROG. The heavy, greasy colas absolutely require trellis netting for support.

Flower Time and Yield

Flowering time ranges from 56-70 days depending on version and phenotype. The 1.0 typically finishes at 60-65 days (9 weeks); the 2.0 runs 63-70 days; the 3.0 finishes at 58-67 days. Indoor flower yields reach 400-500 g/m2, with some growers reporting 1.5-2.0 lbs per light with proper canopy control and defoliation. Outdoor yields of 550-700 g per plant are achievable. However, the true value lies in hash production rather than pure flower weight.

Nutrients and Media

Rainbow Belts is a light-to-moderate feeder that responds to balanced organic nutrients. Watch for nitrogen sensitivity in late veg—this is not a strain to push with high EC. Consistent micronutrients are important to prevent early color fade. Use well-draining soil with good moisture retention (organic compost with perlite is ideal). Flush extensively (14+ days) to ensure white ash and pure flavor expression. In hydro, keep EC moderate and maintain pH at 6.0-6.5.

Environment and Light

Maintain temperatures at 70-80F during lights-on, with lower temperatures under 25C (77F) in late flower being crucial to preserve volatile candy terpenes. Humidity must be tightly managed: 55-60% in veg, reducing to 45-50% during early flower, and strictly 40-45% in the final 3 weeks. The dense, spear-shaped colas are susceptible to mold if humidity is not controlled. Ensure strong airflow throughout the canopy. Full-spectrum LEDs at 600-800 umol/m2/s work well; 18/6 veg and 12/12 flower light cycles are standard.

Color and Bud Structure

Buds are lime-green with soft purple hues and electric orange pistils, coated in a characteristic 'sticky-wet' layer of resin. The 1.0 produces spears denser than standard Zkittlez with a unique knobby structure. The 3.0 develops elongated spears with dense resin stacking and medium-to-tight calyx formation. Anthocyanin expression increases with nighttime temperature drops, producing beautiful yellows and purples during flush. The visual bag appeal is exceptional.

Hash and Wash Data

This is where Rainbow Belts truly excels. The strain is considered one of the best washing cultivars of the decade. Trichome heads are massive and weak-necked, dumping effortlessly in ice water. Fresh-frozen wash yields: 1.0 delivers 4-6%; 2.0 delivers 4.5-6.0% (elite dumper with 6-star full-melt potential); 3.0 delivers 6.0-6.5%+ with elite phenos exceeding 7%. Resin heads concentrate around 90-120 microns for efficient washing. For hash production, harvest at day 60-63 for maximum volatile terpene retention—waiting longer makes the sandy trichomes too fragile. Press temperatures for rosin: 165-175F for bubble hash rosin, 185-195F for flower rosin. Rosin return from dry cured flower: 22-26%. The resulting product is near-white to gold with explosive candy-diesel flavor.

Drying and Curing

A meticulous approach is essential to preserve the delicate candy terpene profile. Slow dry at 60F (15C) and 60% RH for a minimum of 14 days. Rush the dry and you lose the nose. Follow with at least 6 weeks of curing in sealed jars to unlock the full confectionery aroma. Store cool and dark—the volatile esters that define Rainbow Belts' signature candy scent degrade quickly if stored warm. For fresh-frozen hash production, cut and immediately freeze at -40F or below within 30 minutes of harvest.

Pest and Disease

Dense colas require vigilant mold monitoring in late flower. Heavy defoliation around week 3 of flower prevents moisture buildup in the long, spear-shaped colas. The strain is fairly resistant to pests and stress overall, but the extreme resin production can attract certain pests. Standard IPM with beneficial insects and biological controls is recommended.

History & Origin

Archive Seed Bank founder Fletcher 'ThaDocta' Watson selected Moonbow #75 from 200 phenotypes and backcrossed it with the original Zkittlez around 2017, creating Rainbow Belts 1.0. Watson began growing at 17 and started breeding in 2008 out of Portland, Oregon, building a reputation on heirloom genetics. Rainbow Belts existed in limited circles until 2020, when Watson sent genetics to approximately 50 growers — once it hit the clone-seller market, demand exploded. Leafly named it Best Seed to Grow in 2020. By 2021–2023, the strain had crossed over from West Coast connoisseur circles into mainstream dispensary shelves nationwide. Archive subsequently released 2.0 (Rainbow Belts #20 x Rainbow Belts F1 male — a tighter, faster-flowering backcross) and 3.0 (Rainbow Belts #20 x Moonbow 112 F2 #60 — bred specifically for XL hash production, yielding 6%+ fresh-frozen). The 3.0 line has become a dominant force in solventless hash competitions.

Awards & Recognition

●Leafly Best Seed to Grow (2020)
●Ego Clash Hash Competition — Winner (Helios Hash, 2021)
●Transbay Challenge IV LA — Live Hash Rosin Winner (LA Family Farms, 2022)
●Spannabis Champions Cup — 1st and 2nd Place (2023)
●Multiple High Times Cannabis Cup placements (various years)

Notable Crosses

Strains bred using Rainbow Belts as a parent:

Rainbow Belts 2.0 — Rainbow Belts #20 x Rainbow Belts F1 male— Archive Seed Bank

Rainbow Belts 3.0 — Rainbow Belts #20 x Moonbow 112 F2 #60— Archive Seed Bank

Dark Rainbow — GMO x Rainbow Belts— Archive Seed Bank

Blue Belts — Oregon Blueberry x Rainbow Belts— Archive Seed Bank

Bifrost — Rainbow Belts x Platinum— In House Genetics

Candy Belt — Rainbow Belts x Pure Afghani— TH Seeds

Zikigai — Zkittlez x Rainbow Belts x Zkittlez— Hash House

Frequently Asked Questions

7 common questions about Rainbow Belts

What is Rainbow Belts and what are its genetics?

Rainbow Belts is a hybrid cannabis strain (60% Indica / 40% Sativa) bred by Archive Seed Bank. It is a cross of Zkittlez x Moonbow #75, testing at 22-26% THC. Rainbow Belts is Archive Seed Bank's flagship candy-terp cultivar, created by backcrossing Zkittlez into its own Moonbow line (itself Zkittlez-derived) to double down on the fruit-candy terpene profile while adding OG-backed structure and resin density. Released around 2017 and exploding in popularity after ThaDocta distributed genetics to roughly 50 growers in 2020, it rapidly became one of the most sought-after solventless cultivars in the US market.

What does Rainbow Belts smell and taste like?

Rainbow Belts's dominant terpenes are Limonene, Caryophyllene. The aroma is described as intensely candy-forward — fizzy lime candy, tropical fruit snacks, and sour zkittlez sweetness layered over a gassy petrol-kush backbone. growers report the room smelling like artificial fruit candy by week 5 of flower. the nose is loud enough to require carbon filtration. a proper 6-week cure unlocks the full confectionery depth with a sweet-tart sour finish.. The flavor profile features sweet-tart lime candy and tropical fruit on the inhale, transitioning to tangy berry and grape notes mid-palate, finishing with a subtle spicy diesel undertone from the moonbow side. consistently described as tasting like trix cereal or sour fruit candy. the aftertaste lingers for minutes with a sweet-tart echo and gentle peppery tingle. in solventless cold-cure rosin, the flavor scales dramatically — described as citrus gelato with a peppered finish..

What are the effects of Rainbow Belts?

Fast-hitting euphoric rush within minutes; a bright, uplifting cerebral wave that elevates mood and sparks creativity. Users describe it as mentally weightless and giggly. The initial euphoric lift settles into a smooth, full-body relaxation without heavy couch-lock in moderate doses. Consumers report feeling happy, chatty, and socially comfortable while physically at ease. Duration is typically 2–3 hours; the cerebral effects taper first, leaving a gentle physical calm that can ease into sleepiness. Commonly reported uses include Stress relief, Anxiety, Insomnia, Mild pain.

How hard is Rainbow Belts to grow?

Rainbow Belts is rated moderate difficulty. It flowers in 8-10 weeks, reaches medium-tall (100-130 cm) in height, and yields 400–500 g/m² indoors. Best suited for indoor, outdoor, greenhouse environments.

What are the parent strains of Rainbow Belts?

Rainbow Belts is a cross of Zkittlez and Moonbow #75. Zkittlez is the legendary candy-terp cultivar (Grape Ape x Grapefruit) that defined the modern fruit-forward movement; it provides Rainbow Belts' signature confectionery sweetness and bright mental clarity. Moonbow #75 was hand-selected from 200 phenotypes of Archive's Moonbow line (believed to be Zkittlez x Dosidos); it contributes OG Kush-derived plant vigor, denser bud structure, improved resin production, and a gassy kush backbone that gives Rainbow Belts its potency edge over straight Zkittlez..

What strains were bred from Rainbow Belts?

Rainbow Belts has been used as a parent in several notable crosses, including Rainbow Belts 2.0 — Rainbow Belts #20 x Rainbow Belts F1 male, Rainbow Belts 3.0 — Rainbow Belts #20 x Moonbow 112 F2 #60, Dark Rainbow — GMO x Rainbow Belts, Blue Belts — Oregon Blueberry x Rainbow Belts, Bifrost — Rainbow Belts x Platinum. Its genetics contribute to a wide range of modern cultivars.

Has Rainbow Belts won any cannabis awards?

Yes. Rainbow Belts has received recognition including Leafly Best Seed to Grow (2020); Ego Clash Hash Competition — Winner (Helios Hash, 2021); Transbay Challenge IV LA — Live Hash Rosin Winner (LA Family Farms, 2022).

Sources & References (18)

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