How to grow Think Fast

Breeder: Dutch Passion
Genetics: sativa
THC: 15 to 20%
Type: Photoperiod, feminized seeds
Difficulty: moderate
Flowering: about 7 to 8 weeks
Flavors: earthy, pine, sweet

What is specific about Think Fast

Sativa-leaning, expect a big stretch when flowering starts; top early or run a net (ScrOG).
Fast finisher (~8 wks flower), plan your flush early so you don't overrun.

Indoor calendar for Think Fast

Stage	When	Note
Germination	week 1	Warm, humid and dark until the sprout shows.
Seedling	weeks 2 to 3	Gentle light on 18/6.
Vegetative	weeks 4 to 7 (you decide)	Three to six weeks on 18/6; longer growth means a bigger plant.
Flowering	7 to 8 weeks after the switch to 12/12	Expect the plant to stretch in the first two to three weeks.
Harvest	around week 14 to 17	Depends on how long you let it grow first.
Dry and cure	three to four weeks more	One to two weeks drying, then at least two weeks curing in jars.

About 17 to 21 weeks from seed to cured buds, with 7 to 8 weeks of flowering.

Week by week

Germination: Days 1–7

Pop the seed.

Soak in a moist paper towel or plant 1cm deep in light, airy soil.
Keep warm (22–25°C), humid and dark until the sprout appears.
Moist, never soggy.

Seedling: Weeks 2–3

First true leaves.

Gentle light on 18/6, high humidity (~65%).
Tiny waterings near the stem; let the top dry between.
Quarter-strength nutrients at most.

Vegetative: Weeks 4–7 (you control length)

Build the plant.

Photoperiod: keep 18/6 as long as you want size, then flip to 12/12 to begin flowering.
Feed grow (high-N) nutrients; train (LST/topping) for an even canopy.
Sativa-leaning: leggier, give vertical room.

Flowering: ~7–8 weeks of bloom

Buds bulk up.

Now on 12/12. Expect a 2–3 week stretch early, give headroom.
Switch to bloom (high-P/K) nutrients; lower humidity (~45%) to prevent bud rot.
Watch trichomes: mostly cloudy with some amber = peak ripeness.

Flush & harvest: Final 1–2 weeks

Finish clean.

Plain water (no nutrients) the last 1–2 weeks for a smoother smoke.
Harvest, wet-trim, dry slowly (~60°F / 60% RH, 7–14 days).
Cure in jars 2+ weeks, burping daily at first.

~14–16 weeks (plus veg time).

Growing Think Fast outdoors

Outdoors in central Europe photoperiod plants start flowering in early to mid August, so Think Fast, with 7 to 8 weeks of flowering, is usually ready in mid September to early October. That is before the worst of the autumn weather in most years, which makes it a reasonable outdoor choice.

Drying and curing

Its pine and sweet notes come from the most volatile terpenes, the first to go in a warm, fast dry. Dry slowly around 18 °C and 60% humidity for 10 to 14 days and cure in jars to keep them.

How Think Fast compares

At 7 to 8 weeks it finishes faster than 95% of the 98 photoperiod strains in our guides (typical: 8.5 weeks).

Its THC, up to 20%, is in line with the typical 20% for these photoperiod strains.

Bred by Dutch Passion, one of 120 Dutch Passion strains with a grow guide here.

Similar strain	Flowering	THC	Breeder
White Widow	7 to 9 weeks	20%	Dutch Passion
CBD Skunk Haze	9 weeks	10%	Dutch Passion
Euforia	8 to 10 weeks	25%	Dutch Passion
Skunk #1	9 weeks	15%	Dutch Passion

Effects

creative, euphoric, relaxing, uplifting

Grower verdict: 8 reviews, average 4.13/5.

Questions

Is Think Fast easy to grow?

Think Fast is considered moderate to grow. This read draws on 8 grower reviews.

When is Think Fast ready outdoors?

How strong is Think Fast?

The breeder lists 15 to 20% THC. Real results depend on light, feeding and harvest timing.

When should I switch Think Fast to 12/12?

When the plant is about half the final height you want: it can double in size during the first weeks of flowering. Flowering then takes about 7 to 8 weeks.

Grow Think Fast with me on Telegram: what to do each week, a weekly check in, photo diagnosis and harvest timing. Free, no account.

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