Rainbow Sundae 11

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Basic infos

Rainbow Sundae 11 is an ruderalis / indica / sativa from Mephisto Genetics and can be cultivated indoors and outdoors (Where the plants will need a flowering time of ±80 days) Mephisto Genetics's Rainbow Sundae 11 is only available as feminized seeds.

Mephisto Genetics Description

Genetic Heritage RS11 [Deep East Oakland Farms/Doja Pak] x Sundae Thumper

Seed Type F5 Feminised Automatic

Select your character, line up on the grid and wait for the countdown to hit 2 before slamming on the gas. Rainbow Sundae 11 is about to take you on a high-speed rip down the Rainbow coloured unpaved highway (because I don’t want to get us sued with this one). So grab a friend and buckle up for some couch co-op gassed up giggles. 

Doja Pak is a bit of a legend, let’s be honest. The strains he’s popularised have become modern legends and have already made their mark on the industry permanent. Bred by DEOFarms (Deep East Oakland Farms), RS-11 is pretty much the pinnacle and leading light of the candy-gas craze that has been the tippy-top of the industry for a long while now, and it doesn’t seem to be getting blue shelled out of the lead any time soon. We knew as soon as we got our hands on the OG cut we needed to give it the Mephisto turbo-boost.

We had so many options to choose from when it came to the pairing for the RS-11 cut. I’ll be honest, we must’ve crossed most of the Mephisto library to our cuttings to figure out what would really do RS-11 justice. In the end, we just couldn’t move on from one of the very first crosses on our experimentation journey; the award winning Sundae Thumper. Sundae Thumper was a pivotal strain in Mephistory; along with Iced ‘n’ Baked, our Gelauto series from 2023 really showed that we’re not slowing down, and don’t plan to any time soon. When Sundae Thumper won the Best Hybrid award at 2025 edition of the American Autoflower Cup, our reaction was pretty much Nate Diaz; “I’m not surprised, motherFers.”

Rainbow Sundae 11 is sweet and tart, a zesty lemonade infused with a heavy hit of exhaust gas and a refreshing, almost minty finish. A first-round draft pick for the candy-gas craze. She has dense, lightly purpled buds and gives you a euphoric, uplifting experience; the kind of rush you only get from acing the Star Cup and leaving the other players in the dirt. Her resin production is off the charts, generating a blanket of shimmering trichomes that’ll act like a well placed banana peel on your trim scissors come trim day. Combine all of that with high yield potential, size and a forgiving nature that novices will appreciate, Rainbow Sundae 11 could genuinely be a drop of the year candidate for every Meph Head.     

Rainbow Sundae 11 more than earns her place amongst the upper tier of the Mephisto library. She’s an S-tier pick, the kind of overpowered, first-pick character that you’re expecting the devs to nerf in the next patch. Except Mephisto isn’t the grunt fantasy Arrowhead studio, so the fun of Rainbow Sundae 11 isn’t getting patched out any time soon. (Sorry Helldivers, we still love you 💚). 

Indica/Sativa 45/55

Cycle Time 75 to 85 days from sprout

Size 90 to 120 cm

Yield 100 to 160 grams.

Aroma and Flavour Bright, tart lemon-candy and a crisp, menthol lemonade with a heavy backbone of gassy fuel. Sweet and zesty on the inhale with a rich and creamy gas finish on the exhale.

Flavour Keywords Citrusy, Sweet, Fruity, Gassy, and Spicy

Effect A true daily driver for motivation and productivity, a sugar-rush-style euphoric effect, and a guaranteed crowd-pleaser.

Grow Difficulty Novice

Growth Odour Medium

Yield, size, flavour, press-potential and forgiving to grow. Rainbow Sundae 11 might just have it all. Let’s delve into it.

Rainbow Sundae 11 shows impressive early vigor, exploding into the vegetative stage with thick stems and sharp, beautifully serrated 7-to-9-finger fan leaves. In our testing, she responded to her container volume; in more restricted root spaces, she forms a compact, well-spaced candelabra physique, while given more room to roam, she stretches out into a dominant, large-framed pine tree structure with strong lateral branching pushing hard from the lower nodes. She responds beautifully to basic canopy management, requiring only moderate leaf tucking and selective defoliation to keep light penetrating to the lower sites.

Because of her vigour, especially in her lateral branching, it’s noteworthy that you should have some kind of structural support on standby to help keep her frame intact. Jimbo noted in his own grow that despite a fluctuation in his pH levels early on, Rainbow Sundae 11 bounced back the quickest and strongest of all the testers in his tents at the time.

Rainbow Sundae 11 is well-tempered and not particularly prone to any stressors, as with most autoflowers, if you get her off to a good start then you should be golden for the rest of her cycle. She isn’t a particularly heavy feeder or waterer, and combine that with her bounce-backability, she’s a strain we could easily recommend to both novice and experienced growers alike.

The bloom cycle for Rainbow Sundae 11 is a spectacle to behold. Plants fade into a starburst yellow to lavender senescence with multiple hues. Purples creep through in the bracts and sugar leaves as dense, golf-ball-sized buds swell along each node point. Frost production is off the charts, with shimmering trichomes completely consuming every floral cluster, creating an industrial, glue-like resin that is incredibly tactile and sticky. The sheer weight of these resin-heavy, rock-hard nugs will cause the outer branches to bow outward, making support ties mandatory at this point, if you haven’t already offered her a helping hand.

Once into mid-to-late flower, the smells on Rainbow Sundae 11 really take off. Aromatics on the vine come in initially tart, lemon forward and with a gassy essence. Those notes eventually transition into a much sweeter cream candy forward profile while still maintaining much of that dominant lemon and gas. You get a touch of the Sundae Thumper parentage with the overly sweet creamy elements happening in the body of the profile. As a finish, the gas note manifests as a minty-infused lemonade.

Combine the killer colour, density, and aromatics of Rainbow Sundae 11 with a sugar-rush-style euphoric effect, and you get a guaranteed crowd-pleaser. Jimbo has used this as his daily driver for the last several months and it remains one of the undisputed champs for motivation and productivity. You get just shifty enough to respect the strength of the flower without it becoming too overwhelming. It’s functional, but much more heady than our more focused higher ratio sativa dominant selections. The strength is a bit high to be used for creative focus, but energetic enough to keep you off the slump. She’s a solid choice for recreation and any kind of summer-time social event.