Think Fast
Cannabis seeds
by Dutch Passion
Think Fast Feminised Cannabis Seeds by Dutch Passion
Think Fast is a sativa-dominant feminised cannabis seed from Dutch Passion that delivers photoperiod flexibility with autoflowering speed — finishing its bloom in just 8 weeks while producing XL yields. Born from a cross between Power Plant and Think Different AutoFem, this strain inherits the best of both parents: the massive resin production of Power Plant and the rapid growth pace of Think Different.
Pack Sizes
Available in packs of 3 seeds or 5 seeds. If you're running a single tent with 4 plants, the 5-pack gives you a spare in case of any germination hiccups. For a quick test run or a SOG setup where you're sourcing multiple strains, the 3-pack keeps things economical.
| Specification | Detail |
|---|---|
| Seed Bank | Dutch Passion |
| Genetics | Power Plant x Think Different AutoFem |
| Type | Feminised photoperiod |
| Dominance | Sativa-dominant |
| Flowering Time | 8 weeks |
| Yield | XL |
| Growing Environment | Indoor, outdoor, greenhouse |
| Pack Sizes | 3 seeds / 5 seeds |
| SKU (5-pack) | CSDP0140 |
| SKU (3-pack) | CSDP0082 |
Why Think Fast Seeds Deserve a Spot in Your Grow Room
Here's the science behind this one: when you cross an autoflowering strain with a photoperiod strain, the offspring don't automatically flower — they still respond to light cycles. But they inherit a significantly compressed flowering period from the auto parent. Dutch Passion figured this out and ran with it, crossing their legendary Power Plant (a heavy-yielding sativa that's been around since the late '90s) with Think Different AutoFem (one of the fastest autos in their catalogue).
The result? A plant that grows bigger and taller than your typical auto — because it stays in veg as long as you keep the lights on 18/6 — but then races through flower in 8 weeks flat once you flip to 12/12. That's 2-3 weeks faster than most sativa-dominant photoperiod strains, which typically drag on for 10-12 weeks in bloom. For growers who want sativa effects without the sativa wait, Think Fast is genuinely one of the best fast-flowering feminised seeds on the market.
The XL yield potential comes directly from Power Plant's genetics. We've seen this parent strain produce absolute monsters under HPS and LED alike, and Think Fast carries that same vigour. The colas grow huge and heavily frosted with resin — the kind that make you double-take when they start stacking during weeks 5-6.
Think Fast Growing Tips
We get asked about fast-flowering photoperiods fairly often, and the number one mistake growers make is treating them exactly like a standard 10-week sativa. They're not. Think Fast moves quickly, so your feeding schedule needs to keep pace.
- Germinate using the paper towel method or directly in a propagation plug. Tap roots typically emerge within 24-72 hours.
- Veg under 18/6 light for 3-5 weeks depending on your target plant size. She grows tall and stretchy — expect 50-100% stretch when you flip.
- Switch to 12/12 when plants reach roughly half your desired final height. The sativa stretch is real with this one.
- Increase phosphorus and potassium from week 3 of flower. The rapid bud development means she's hungry earlier than slower strains.
- Support the branches from week 5 onwards. The XL colas get heavy and side branches can snap without stakes or a trellis net.
- Harvest at week 8 of 12/12. Check trichomes with a loupe — you're looking for mostly cloudy with 10-15% amber for a balanced effect.
One honest limitation: because she flowers so fast, there's less margin for error during bloom. A nutrient lockout in week 4 costs you proportionally more than it would on a 12-week strain. Keep your pH dialled in (5.8-6.2 in hydro, 6.0-6.5 in soil) and don't skip the cal-mag.
Think Fast vs Other Fast-Flowering Feminised Seeds
Compared to Dutch Passion's own Think Different (the autoflowering parent), Think Fast gives you more control. You decide when she flowers, how big she gets, and you can take clones — none of which you can do with an auto. The trade-off is you need a separate veg and flower space, or you're committing your whole tent to one light cycle.
| Feature | Think Fast (Photoperiod) | Think Different (Auto) |
|---|---|---|
| Light cycle control | Yes — flip to 12/12 when ready | No — flowers automatically |
| Flowering time | 8 weeks from flip | Around 70 days seed to harvest |
| Yield potential | XL | Large (but limited by auto genetics) |
| Cloning | Yes | Not practical |
| Plant size | Taller — you control veg length | Medium — genetics determine size |
| Dominance | Sativa-dominant | Sativa-dominant |
If you're running a perpetual harvest setup, Think Fast slots in beautifully. You can veg a batch while the previous one finishes in 8 weeks, keeping your rotation tight without sacrificing yield or potency.
Sensory Profile and What to Expect at Harvest
The resin production on Think Fast is inherited straight from Power Plant — expect sticky, trichome-coated buds with a pungent, slightly spicy aroma during late flower. The colas stack dense for a sativa-dominant plant, though they're not quite as rock-hard as a pure indica. You'll notice the classic sativa structure: long internodal spacing, thinner fan leaves, and buds that stretch along the branches rather than clustering into single golf balls.
When you crack open a dried bud, there's a sweet, earthy base with a hint of pepper. The bag appeal is strong — the frost catches light in a way that tells you potency is there before you even test it.
Complete your setup with a quality propagation kit for germination and a carbon filter to handle the pungent late-flower aroma. If you're growing indoors, a trellis net pays for itself in supported colas and better light penetration across the canopy.
Frequently Asked Questions
Is Think Fast an autoflower or photoperiod?
Photoperiod. Despite having Think Different AutoFem in its lineage, Think Fast does not auto-flower. You control the switch to bloom by changing your light cycle to 12/12. This gives you full control over plant size and veg duration.
How long does Think Fast take from seed to harvest?
Total time depends on how long you veg. Most growers run 3-5 weeks of vegetative growth plus 8 weeks of flowering, putting total time at roughly 11-13 weeks from germination to harvest. Outdoors in the Northern Hemisphere, she finishes earlier than most sativa-dominant strains — typically by early October.
Can I grow Think Fast outdoors in a cooler climate?
Yes — the 8-week flowering period means she finishes before autumn humidity and cold set in. Dutch Passion specifically notes she performs well in greenhouses too, which gives you extra protection against late-season rain while still using natural light.
What yields can I expect from Think Fast?
Dutch Passion rates her as XL. Indoors under 600W HPS or equivalent LED, experienced growers report substantial harvests. Outdoors with a long veg period and good sun exposure, she can grow tall and produce accordingly. Feed well and support those branches.
Is Think Fast suitable for beginners?
She's forgiving during veg and grows vigorously, which helps newer growers. The main challenge is the fast flowering — you need to have your nutrients and environment dialled in before you flip, because there's less time to recover from mistakes during bloom. If you've done one or two grows already, you'll handle her fine.
Can I take clones from Think Fast?
Absolutely. As a photoperiod strain, she clones without issue. Take cuttings during veg, root them under 18/6, and you've got identical copies ready for the next round. This is one of the key advantages over autoflowering varieties.
What's the difference between Think Fast and Power Plant?
Power Plant is the yield parent — a proven heavy producer. Think Fast inherits that yield potential but flowers significantly faster thanks to the autoflowering genetics from Think Different. You get similar harvests in less time. Power Plant typically needs 9-10 weeks in flower; Think Fast wraps up in 8.
Last updated: April 2026
Related products
You might also like
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.