Mental Rainbow F1 Fast Version is a fast-flowering take on Rainbow Sherbert #11, a celebrated California cut that Sweet Seeds ranks among the Super Strong genetics. Sweet Seeds released this feminized photoperiod F1 hybrid, variety SWS118, in February 2025, and it pairs 22–30% THC with a tropical mango and papaya bouquet and 7–8 weeks of bloom.
It grows with a predominantly Indica frame at 65% Indica and 35% Sativa, building a prominent central cola surrounded by dense side flowers. The trichome output is abundant, which makes it a strong pick for quality extractions, and the breeder recommends it to growers looking for an easy-to-grow, fast-flowering photoperiod plant.
Lineage: Rainbow Sherbert #11 x Papaya Zoap Auto
The breeder used a selected line of its Papaya Zoap Auto (SWS107), itself a cross of [Bruce Banner Auto (SWS91) x Papaya] x (Z x Zoap), as the base, and brought in a California elite clone of Rainbow Sherbert #11 for potency and aromatic complexity. The goal was a modern, fast hybrid with an exotic terpene profile and heavy resin.
Like every F1 Fast Version, it is a photoperiod plant with autoflowering ancestry, not an autoflower. It flowers when the light is switched to 12/12 indoors, or as the days shorten outdoors, and the auto parent contributes a shorter bloom.
Aroma, Flavor and Effect
The terpene mix is a sweet, fruity blend led by mango and papaya, brightened with citrus and grounded by earthy, smoky and spicy undertones. It recalls a tropical fruit salad grilled over wood smoke with a pinch of spice, juicy and fresh up front with depth on the finish.
The effect lands within minutes and lasts for several hours. It starts euphoric and energetic, opening the mind to imagination and creativity, then shifts into a pleasant relaxation that blends with the uplift. Sweet Seeds lists it as stimulating, psychoactive, happy and relaxing, and with THC up to 30% it is very potent, so modest servings are wise.
Growing Indoors and Outdoors
Indoors, after a short veg and the switch to 12/12, plan on 7–8 weeks of flowering. With optimal parameters the breeder reports 450–500 g/m² (1.47–1.64 oz/ft²). The compact, well-branched frame with a dominant main cola suits a Sea of Green, while a light LST setup brings the side branches up to the light for more even buds.
Outdoors, a sunny site, quality soil mix and adequate nutrition support 350–500 g/plant (12.3–17.6 oz/plant) per plant. The robust structure holds up well, and the short bloom brings harvest forward compared with a standard photoperiod Rainbow Sherbert. Harvest when the trichomes turn cloudy to get the most out of the resin.
Mental Rainbow F1 Fast Version Characteristics
| Strain type | Feminized photoperiod, F1 Fast Version |
| Variety code | SWS118 |
| Genetics | Rainbow Sherbert #11 elite clone x Papaya Zoap Auto (SWS107) |
| Indica/Sativa | 65% Indica / 35% Sativa |
| THC | 22–30% |
| CBD | 0.1% |
| Effect | Stimulating, psychoactive, happy, relaxing |
| Aroma/Flavor | Sweet, fruity, mango, papaya, citrus, earthy, smoky, spicy |
| Indoor yield | 450–500 g/m² (1.47–1.64 oz/ft²) |
| Outdoor yield | 350–500 g/plant (12.3–17.6 oz/plant) |
| Flowering time | 7–8 weeks indoors (12/12) |
| Best cultivation technique | SOG or LST |
FAQ
Is Mental Rainbow F1 Fast Version an autoflower?
No. It is a feminized photoperiod F1 hybrid. It needs 12/12 lighting indoors to flower and finishes in 7–8 weeks thanks to its Papaya Zoap Auto parent.
How potent is Mental Rainbow F1 Fast Version?
Sweet Seeds lists 22–30% THC with about 0.1% CBD. The effect is fast-acting, long-lasting and blends stimulation, happiness and relaxation.
Is Mental Rainbow F1 Fast Version Indica or Sativa?
It is Indica-dominant, with 65% Indica and 35% Sativa genetics and a compact, well-branched structure.
What does Mental Rainbow F1 Fast Version taste like?
It offers sweet tropical fruit with mango, papaya and citrus, backed by earthy, smoky and spicy undertones.
Is Mental Rainbow F1 Fast Version easy to grow?
Sweet Seeds recommends it for growers looking for easy-to-grow, fast-flowering photoperiod genetics, and its vigorous, robust frame is forgiving.
Do Sweet Seeds packs include free seeds?
Yes. Sweet Seeds adds extra seeds to its smaller packs: the 3-seed pack of Mental Rainbow F1 Fast Version comes with 1 free bonus seed and the 5-seed pack comes with 2 free seeds. The 25-seed pack comes without extra seeds.
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