Sweet Mandarine Zkittlez F1 Fast Version
Cannabis seeds
by Sweet Seeds
Sweet Mandarine Zkittlez F1 Fast Version Cannabis Seeds
Sweet Mandarine Zkittlez F1 Fast Version is an indica-dominant feminised cannabis seed from Sweet Seeds that finishes flowering in just 7 weeks flat. Built from a carefully selected Zkittlez clone crossed with Sweet Mimosa XL Auto, this F1 Fast Version packs 19–24% THC into resinous, occasionally purple-hued buds that smell like a fruit bowl someone left next to a diesel pump. If you grow in a climate where autumn arrives early, or you simply hate waiting, this one deserves a spot in your rotation.
Pack Size
Available in a pack of 3 feminised seeds. Each seed is an F1 Fast Version — photoperiod, not autoflower — so you control the vegetative phase length yourself before flipping to 12/12.
| Specification | Detail |
|---|---|
| Seed Bank | Sweet Seeds |
| Seed Type | Feminised (F1 Fast Version) |
| Genetics | Zkittlez clone x Sweet Mimosa XL Auto |
| Indica / Sativa | 60% Indica / 40% Sativa |
| THC Content | 19–24% |
| Flowering Time | 7 weeks (49 days) |
| Indoor Yield | 450–650g/m2 |
| Outdoor Yield | 450–650g per plant |
| Possible Phenotype Traits | Purple colouring in late flowering |
| Seeds Per Pack | 3 |
Why Sweet Mandarine Zkittlez F1 Fast Version Stands Out
Seven weeks of flowering. That's it. Most photoperiod strains ask for 8–10 weeks minimum, and some sativa-leaning varieties push well past that. Sweet Seeds achieved this speed by crossing a photoperiod Zkittlez clone with their Sweet Mimosa XL Auto — the autoflowering genetics contribute a faster internal clock without converting the offspring into a full auto. You still get to decide when flowering starts by switching your light schedule to 12/12, but once you flip, the countdown is short.
The practical upside is obvious if you grow outdoors in northern Europe. A 7-week flowering window means you can harvest before the damp, grey weather of October sets in — which is when mould and bud rot start ruining people's seasons. Indoors, it means faster turnaround between runs. If you're pulling 450–650g/m2 every 7 weeks instead of every 9, the maths works out nicely over a year.
And then there's the Zkittlez parentage. That clone was selected specifically for resin production and high THC, and it shows in the offspring. At 19–24% THC, Sweet Mandarine Zkittlez F1 Fast Version sits comfortably in the strong-but-not-overwhelming bracket. The indica dominance (60%) means plants tend to stay compact and manageable, though the 40% sativa influence keeps the effects from being purely sedative — expect uplifting, stimulating qualities rather than couch-lock.
Terpene Profile and Aroma of Sweet Mandarine Zkittlez
This is where the strain really earns its name. Crack open a cured jar and you get hit with sweet mandarin citrus first — bright, almost candy-like. Underneath that top note sits a layer of mixed fruit that's clearly inherited from the Zkittlez side. But it's not all sugar: there's a diesel backbone and a touch of spice that give the profile some edge, plus a thread of fresh pine that keeps the whole thing from tipping into one-dimensional sweetness.
When smoked or vaporised, that complexity holds up. The inhale is fruit-forward and smooth, while the exhale brings out the spicier, earthier notes. If you've grown Zkittlez crosses before, you'll recognise the family resemblance — but the mandarin citrus twist from the Sweet Mimosa XL Auto side gives this one its own identity. It's the kind of terp profile that makes you sniff the jar twice before closing it.
Some phenotypes develop purple colouring in the final weeks of flowering, particularly if nighttime temperatures drop below 15°C. It doesn't affect potency or flavour in any meaningful way, but it does make for a striking-looking plant — and impressive bag appeal if that matters to you.
Growing Sweet Mandarine Zkittlez F1 Fast Version Seeds
Sweet Seeds bred this strain to be forgiving, and from what we've seen, it delivers on that. The indica-dominant structure means plants stay relatively squat with strong lateral branching — good news if vertical space is limited. You won't need to do aggressive training, though a bit of LST (low-stress training) during veg can open up the canopy and boost light penetration to lower bud sites.
- Germinate seeds using the paper towel method or directly in a small pot of moist seedling soil. Keep temperatures around 22–26°C for best germination rates.
- Transplant seedlings into their final containers once they have 2–3 sets of true leaves. A 15–20 litre pot works well for indoor grows.
- Vegetate under 18/6 light for 3–5 weeks depending on how large you want your plants. Longer veg means bigger frames and potentially higher yields.
- Flip to 12/12 to trigger flowering. Mark the calendar — you're looking at roughly 49 days (7 weeks) from here to harvest.
- During weeks 4–5 of flowering, watch for the resin production to ramp up significantly. This is when the terpene profile really develops, so keep your grow room well ventilated — the smell gets loud.
- Harvest when trichomes are mostly cloudy with a few turning amber. Dry in a dark room at 18–20°C and 55–60% humidity for 7–10 days, then cure in glass jars for at least 2 weeks.
One honest note: the "450–650g/m2" yield range is broad, and hitting the upper end requires dialled-in conditions — proper lighting (at least 400W HPS equivalent or a quality LED), consistent feeding, and good environmental control. First-time growers should realistically aim for the middle of that range and be happy with it. Outdoors, plants can produce the same 450–650g per plant, but only if they get enough direct sunlight and aren't battling poor soil or pests.
| Growing Parameter | Recommendation |
|---|---|
| Light Cycle (Veg) | 18/6 |
| Light Cycle (Flower) | 12/12 |
| Ideal Temperature | 20–26°C |
| Relative Humidity (Flower) | 40–50% |
| Pot Size (Indoor) | 15–20 litres |
| Training | LST recommended, not required |
| Flowering Duration | 7 weeks from 12/12 flip |
| Harvest Window (Outdoor, Northern Europe) | Late September to early October |
How Sweet Mandarine Zkittlez Compares to Similar Fast-Flowering Strains
If speed is your priority, you've got options. Sweet Seeds' own catalogue includes several F1 Fast Version strains, and other seed banks offer quick-flowering genetics too. What sets Sweet Mandarine Zkittlez apart is the combination of speed, yield, and terpene complexity. A lot of fast-flowering varieties sacrifice either potency or flavour for the sake of a shorter cycle — this one keeps both intact at 19–24% THC and a genuinely layered aroma.
Compared to a standard photoperiod Zkittlez, you're saving roughly 1–2 weeks of flowering time without a dramatic drop in resin production. Compared to autoflowering Zkittlez varieties, you keep the ability to control plant size through veg length — useful if you want to fill a screen or run a SOG setup. The F1 Fast Version format sits in a sweet spot between the two approaches, and we'd pick it over a full auto for anyone growing indoors with a proper light setup.
Running a full indoor cycle? Pair these seeds with a complete grow tent kit to control every variable from day one. A carbon filter is non-negotiable once these plants hit week 4 of flowering — the fruity terpenes are gorgeous, but they'll announce themselves to the entire building without proper extraction.
Effects and THC Content
At 19–24% THC with a 60/40 indica-sativa split, Sweet Mandarine Zkittlez F1 Fast Version leans toward uplifting and stimulating effects rather than heavy sedation. Sweet Seeds describes the experience as happy and fun — the kind of strain you'd reach for before a social gathering or a creative session rather than before bed. The indica side provides physical relaxation without the full-body heaviness that pure indicas tend to deliver.
For those newer to strains in this THC range, grower journals suggest that 1–2 small puffs is a sensible starting point, roughly equivalent to an inhaled THC intake near the 2.5–5mg range depending on your consumption method and how well the buds were cured. You can always have more; you can't have less.
Frequently Asked Questions
What does "F1 Fast Version" actually mean?
It means the seeds are first-generation crosses between a photoperiod strain and an autoflowering strain. The offspring inherit faster flowering genetics but remain photoperiod-dependent — they won't flower automatically. You still need to switch to a 12/12 light cycle to trigger bloom, but the flowering phase itself is significantly shorter than a standard photoperiod variety.
How long does Sweet Mandarine Zkittlez F1 Fast Version take from seed to harvest?
Flowering takes approximately 7 weeks (49 days) after you flip to 12/12. Total time from seed depends on how long you vegetate — most growers run 3–5 weeks of veg, putting the full cycle at roughly 10–12 weeks from germination to chop day.
Will all plants turn purple?
No. Some phenotypes develop purple hues toward the end of flowering, especially when nighttime temperatures drop below 15°C. Others stay green throughout. It's a genetic lottery with this strain — you might get it, you might not. Either way, potency and flavour aren't affected.
Is this strain suitable for beginner growers?
Yes, it's a solid pick for your first or second grow. The indica-dominant structure keeps plants compact and manageable, and the 7-week flowering time means less time for things to go wrong. Aim for the middle of the yield range (around 500–550g/m2) and focus on getting your environment stable rather than chasing maximum output.
Can I grow Sweet Mandarine Zkittlez F1 Fast Version outdoors in the UK or northern Europe?
Absolutely — that's one of its strongest selling points. The 7-week flowering period means outdoor plants can finish by late September to early October, before the worst of the autumn weather arrives. Just make sure plants get as much direct sunlight as possible and watch humidity levels closely during the final weeks to prevent mould.
What yield can I realistically expect indoors?
Sweet Seeds lists 450–650g/m2. The lower end is achievable with a decent setup and basic knowledge. Hitting 600g+ requires strong lighting (quality LED or 600W HPS), proper nutrition, and good airflow. Most intermediate growers land somewhere around 500–550g/m2, which is still a very respectable haul for a 7-week flower.
How does this compare to growing regular Zkittlez seeds?
Standard Zkittlez typically flowers in 8–9 weeks, so you're saving 1–2 weeks with the F1 Fast Version. THC levels are comparable (19–24% vs. 19–23% for most Zkittlez cuts), and the terpene profile is similar but with added mandarin citrus notes from the Sweet Mimosa XL Auto parent. The trade-off is minimal — you get speed without giving up much.
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.