Green Poison - F1 Fast Version

Green Poison F1 Fast Version Cannabis Seeds

Green Poison F1 Fast Version is a feminised photoperiod cannabis seed from Sweet Seeds that finishes flowering in just 6 weeks indoors — roughly 2 weeks faster than the original Green Poison. Built on a 70% Indica / 30% Sativa genetic split, this F1 Fast Version keeps the resinous, compact bud structure the original is famous for while shaving serious time off your harvest schedule. If you're growing in a climate where autumn rains threaten outdoor crops, these seeds let you chop at the beginning of September instead of sweating through October.

Why These Fast Version Seeds Stand Out

Speed is the defining advantage of this strain, and Sweet Seeds have delivered it without gutting the genetics. The original Green Poison already had a reputation for being quick — around 8 weeks of flowering. The Fast Version crosses that proven mother with a carefully selected autoflowering parent, then stabilises the offspring back to photoperiod dependence. The result: a plant that still responds to light-cycle changes (so you control when flowering starts) but races through the bloom phase like an auto.

We'd pick this over the original if you're working with a tight grow calendar or running multiple cycles per year indoors. Two weeks saved per run adds up to an entire extra harvest annually if you're doing perpetual rotations. That's not a small thing.

The honest limitation? With a 6-week flower time, you're trading a small amount of final bulk for speed. Yields are still solid — Sweet Seeds rates this strain generously — but if you're chasing absolute maximum weight per plant and time isn't a factor, the standard version or a longer-flowering hybrid might edge it out. For most growers, though, the time saved more than compensates.

Genetics and Terpene Profile

Sweet Seeds developed this strain from a selection of elite Indica-dominant genetics, and it has become one of their flagship offerings since its original release. The 70/30 Indica-Sativa ratio shows in the plant structure: compact, bushy, with tight internodal spacing and dense flower clusters that stack up along the main cola and side branches.

The terpene profile leans sweet and earthy with a distinct fruity undertone — think overripe berries with a skunky backbone. When you crack open a cured bud, there's a sugary, almost candy-like sweetness that explains the name. The aroma intensifies significantly in the final 2 weeks of flowering, so if you're growing indoors without a carbon filter, your neighbours will know about it. Data from the EMCDDA confirms that Indica-dominant cultivars like this one tend to produce terpene profiles rich in myrcene and caryophyllene, which aligns with the earthy-sweet character growers report.

Growing Tips for This Fast-Finishing Strain

This strain is genuinely forgiving for less experienced growers. The Indica dominance means the plant stays manageable in height — typically 80–120 cm indoors depending on veg time — and the compact structure handles SOG (Sea of Green) setups well. You can pack more plants per square metre without fighting for canopy space.

1. Germinate your seeds using the paper towel method or directly in a propagation plug. Taproots typically emerge within 24–72 hours at 22–25°C.
2. Transplant seedlings into their final containers once the first true leaves appear. For SOG, 6.5–11 litre pots work well. For fewer, larger plants, go 15–20 litres.
3. Veg under 18/6 light for 2–4 weeks depending on your target plant size. Because flowering is only 6 weeks, a slightly longer veg period (3–4 weeks) helps maximise final yield without extending your total cycle much.
4. Flip to 12/12 to trigger flowering. You should see pistils within the first 5–7 days — these genetics respond fast.
5. During weeks 3–5 of flower, the buds bulk up rapidly. Maintain humidity below 50% to prevent mould in those dense Indica colas.
6. Flush for the final 7–10 days if growing in soil, or follow your nutrient schedule's late-bloom protocol for coco or hydro.
7. Harvest when trichomes show mostly milky-white with 10–20% amber under a jeweller's loupe. At 6 weeks, check daily from day 38 onwards — the window is tighter than with slower strains.

Outdoors in Northern Europe, the early September harvest window is the real selling point. Most photoperiod strains aren't ready until mid-October, by which point you're battling rain, cold nights, and bud rot. This fast-finishing variety sidesteps all of that. In Mediterranean climates, you're harvesting in summer warmth — almost unfairly easy.

Fast Version vs Standard: Side-by-Side Comparison

The question we get asked most: is the fast version actually as good? Here's the straight comparison.

If you're running a single outdoor grow per year in a rainy Northern European climate, the fast version is the better call — full stop. Indoors, it depends on whether you value those extra 2 weeks of potential bulk or prefer a faster turnaround. We've seen growers fit 5 cycles per year with the fast version where they'd only manage 4 with the standard.

How to Buy These Seeds and What to Pair Them With

You can buy these feminised seeds at Azarius in 3-seed packs. Each pack ships discreetly and stores well in a cool, dark place if you're not planting immediately.

Frequently Asked Questions

Last updated: April 2026