Auto Rainbow Sherbet 11
Cannabis seeds
by Advanced Seeds
Auto Rainbow Sherbet #11 Cannabis Seeds by Advanced Seeds
Auto Rainbow Sherbet #11 is an autoflowering cannabis seed from Advanced Seeds that packs 27% THC into a compact, fast-finishing plant. Bred from the photoperiod Rainbow Sherbet #11 crossed with ruderalis genetics, this auto delivers a sweet citrus and Kush terpene profile with heavy resin production — all within 75 days from germination. At 70–85 cm indoors, it fits into the tightest grow spaces without sacrificing yield.
This pack contains 3 feminised autoflowering seeds. No photoperiod version is available from Advanced Seeds under this name — if you want the original Rainbow Sherbet #11 as a photoperiod, you'll need to look at a different breeder's catalogue.
Why Auto Rainbow Sherbet #11 Deserves a Spot in Your Grow
Most autos make you choose: either you get decent potency or you get a manageable plant. Auto Rainbow Sherbet #11 doesn't ask you to compromise. At 27% THC, it sits comfortably in territory usually reserved for photoperiod elites, yet the plant itself stays between 70 and 85 cm indoors — short enough to tuck under a shelf light or slot into a 60x60 tent alongside a companion plant or two.
The speed is the other selling point. You're looking at 75 days from the moment the seed cracks to chopping day. No light schedule changes, no worrying about light leaks triggering hermaphrodites. Drop the seed, keep the lights on 18/6 or 20/4, feed sensibly, and the plant does the rest. We'd call it beginner-friendly, and we mean that — this is genuinely one of the easier autos to grow without babysitting.
The one honest limitation: because it's an auto, you can't extend the vegetative phase if something goes wrong early on. If you stunt it in the first two weeks with overwatering or root stress, the plant won't have time to recover before it flips to flower. So get your medium and watering dialled in from day one. Autos forgive a lot of things, but a rough start isn't one of them.
Terpene Profile and Aroma of Auto Rainbow Sherbet #11
The nose on Auto Rainbow Sherbet #11 is where this strain really earns its name. Open a jar and you get hit with sweet citrus first — think blood orange peel with a layer of tropical guava underneath. Then the earthiness rolls in: spicy, slightly peppery, with that unmistakable old-school Kush funk tying the whole thing together. It smells like a fruit bowl left next to a bag of classic hash, and we mean that as a compliment.
Resin production is heavy. By the final weeks, the buds and surrounding sugar leaves are coated in trichomes, making this a strong candidate if you're interested in making extracts or dry sift alongside your flower harvest. The sticky, fragrant flowers dry into dense nugs that keep their scent well in storage — just make sure you've got a proper cure going for at least two weeks to let those terpenes fully develop.
Compared to something like Auto Gelato or Auto Zkittlez, Rainbow Sherbet #11 leans more towards the earthy-Kush end of the spectrum rather than pure candy sweetness. If you like your terps with some depth and a savoury backbone, this is the better pick.
Growing Auto Rainbow Sherbet #11 Seeds
Auto Rainbow Sherbet #11 is a straightforward grow that won't punish you for being a first-timer. Here's how to get the best out of these seeds.
- Germinate using the paper towel method or directly in a small pot of lightly moistened coco or soil. Taproot should appear within 24–72 hours.
- Transplant into your final container as soon as the seedling emerges — autos don't like being repotted, so go straight into an 11–15 litre pot to avoid root disturbance.
- Set your light schedule to 18/6 or 20/4. These plants don't need a dark period to flower, but 18/6 saves a bit on electricity and gives the plant a rest window.
- Keep feeding light during the first 2–3 weeks. Autoflowers are sensitive to nutrient burn early on, so start at half the recommended dose of your chosen nutrient line and increase gradually.
- Watch for the first pistils around week 3–4. Once flowering kicks in, switch to bloom nutrients and consider adding a PK booster from week 5 onwards.
- Maintain temperatures between 20–26°C and relative humidity around 40–50% during flowering to protect those resinous buds from mould.
- Harvest around day 75 from seed. Check trichomes with a jeweller's loupe — mostly milky with a few amber heads is the sweet spot for maximum potency.
Auto Rainbow Sherbet #11 Specifications
| Spec | Value |
|---|---|
| Seed Bank | Advanced Seeds |
| Type | Autoflowering, Feminised |
| Genetics | Rainbow Sherbet #11 x Ruderalis |
| THC Content | 27% |
| Seed to Harvest | 75 days |
| Indoor Height | 70–85 cm |
| Outdoor Height | 100–120 cm |
| Indoor Yield | 450–500 g/m² |
| Dominant Terpenes | Sweet citrus, guava, Kush, earthy-spicy |
| Seeds per Pack | 3 |
| SKU | CSAD0077 |
Running Auto Rainbow Sherbet #11 in a small tent? Pair it with a compact carbon filter setup — at 27% THC and heavy resin production, this strain gets loud in the final weeks. A 4-inch inline fan and carbon filter combo keeps things discreet. If you're growing in coco, grab a complete coco nutrient kit to keep feeding simple from seed to harvest.
What Makes Auto Rainbow Sherbet #11 Stand Out
The autoflowering seed market is packed, and a lot of autos still hover around the 18–22% THC mark. Auto Rainbow Sherbet #11 at 27% puts it in genuinely rare territory. Advanced Seeds have managed to preserve the potency and terpene complexity of the photoperiod parent while adding ruderalis convenience — and that's not easy to do without losing something along the way.
The compact stature is the other major draw. At 70–85 cm indoors, you can run this in a 60x60 cm tent under a small LED without the plant outgrowing the space. Outdoors, 100–120 cm means it blends in with tomato plants or other garden companions without drawing attention. The yield of 450–500 g/m² indoors is solid for an auto this size — you're not sacrificing harvest weight for the compact frame.
Where we'd nudge you towards a different strain: if you want a sativa-dominant effect or a plant that stretches tall with airy buds, this isn't it. Auto Rainbow Sherbet #11 produces dense, resinous flowers with a powerful, long-lasting effect. It's built for potency and flavour, not for a light daytime smoke. Know what you're getting into.
Indoor vs Outdoor Growing Comparison
| Factor | Indoor | Outdoor |
|---|---|---|
| Height | 70–85 cm | 100–120 cm |
| Yield | 450–500 g/m² | Comparable (plant-dependent) |
| Time to Harvest | 75 days from seed | 75 days from seed |
| Light Schedule | 18/6 or 20/4 recommended | Natural daylight — any season works |
| Stealth | Fits 60x60 cm tents easily | Blends with companion plants |
| Best For | Controlled environment, year-round grows | Balcony grows, guerrilla setups |
Frequently Asked Questions
How long does Auto Rainbow Sherbet #11 take from seed to harvest?
About 75 days from germination to chop day. That's roughly 10–11 weeks total. No light schedule change needed — the plant transitions to flower automatically around week 3–4.
Is Auto Rainbow Sherbet #11 good for beginners?
Yes. It's one of the more forgiving autos we've seen. The compact size means less training is needed, and the 75-day cycle leaves little room for drawn-out mistakes. Just don't overwater in the first two weeks — that's the one thing autos don't bounce back from easily.
What's the THC level of Auto Rainbow Sherbet #11?
Advanced Seeds lists it at 27% THC. That's high for any cannabis strain and exceptionally high for an autoflower. Expect dense, resinous buds with strong, long-lasting effects.
How tall does Auto Rainbow Sherbet #11 grow indoors?
Between 70 and 85 cm indoors. It's a compact plant that fits comfortably in small tents. Outdoors it stretches a bit more, reaching 100–120 cm.
What does Auto Rainbow Sherbet #11 smell and taste like?
Sweet citrus and guava dominate, backed by earthy, spicy Kush notes. Think tropical fruit with a savoury, old-school cannabis backbone. The flavour carries through well after a proper two-week cure.
What yield can I expect from Auto Rainbow Sherbet #11?
Indoors under good light, 450–500 g/m² is realistic. Outdoors you can expect a similarly rewarding harvest per plant, though exact numbers depend on sun exposure and container size.
Can I grow Auto Rainbow Sherbet #11 outdoors in a cool climate?
The 75-day cycle makes it viable in shorter summers. As long as you get consistent daylight and temperatures stay above 15°C at night, the plant will finish. Start seeds indoors and move them out once nights are warm enough.
Last updated: April 2026
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Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.