Green Poison Auto vs Green Poison FAST Version: Which Is Best for You?

1. Introduction

Green Poison Auto and Green Poison FAST Version are closely related strains from Sweet Seeds, both built around the popular Green Poison line. They share a hybrid background and a focus on strong potency, but they are designed for slightly different growers and setups. If you’re new to cultivation, chasing bigger yields, or mainly interested in powerful effects, understanding how these two compare can make your buying decision much easier.

2. Quick Comparison Table

Feature	Green Poison Auto	Green Poison FAST Version
Breeder	Sweet Seeds	Sweet Seeds
Seed Type	Autoflowering	Feminized (photoperiod)
Genetics	Big Devil #2 × Green Poison	Green Poison × Green Poison Auto
Type	Hybrid	Hybrid
Flowering behaviour	Autoflowering (no light cycle change needed)	Photoperiod “fast version” (requires light cycle change)
Yield	Good	Not specified
THC	Strong	Not specified
Flavour / Aroma	Sweet and fruity with a subtle hint of skunk	Not specified

3. Green Poison Auto Overview

Green Poison Auto is the automatic version of Green Poison, created by crossing Big Devil #2 with the original Green Poison. As an autoflowering hybrid, it is designed to start flowering automatically after a short vegetative phase, regardless of the light cycle.

This strain is described as having a sweet and fruity flavour with a subtle hint of skunk, which can appeal if you like classic skunky undertones but prefer them softened by fruitier notes. The breeder also notes that Green Poison Auto has a strong THC level, so its effects are likely to feel potent, which may suit users looking for a more intense experience rather than something very mild.

In terms of production, Green Poison Auto is rated with a good yield. While there are no specific numbers provided, “good” suggests it offers a respectable return for an autoflower, which typically trades some yield potential for speed and simplicity. Being autoflowering also means you do not need to change the light schedule to trigger flowering, which is a major convenience for new growers or anyone who wants a straightforward grow cycle.

Overall, Green Poison Auto is aimed at growers who want:

• An easy, light-cycle-independent grow (autoflowering)
• Sweet, fruity flavours with skunky hints
• Strong THC effects
• Reliable, “good” yields in a relatively compact timeframe

4. Green Poison FAST Version Overview

Green Poison FAST Version is a feminized, photoperiod hybrid that blends Green Poison with Green Poison Auto genetics. This “fast version” concept usually aims to shorten the flowering duration compared with a standard photoperiod strain, while still keeping the photoperiod structure and potential for more control over plant size and yield.

As a feminized, non-autoflowering strain, Green Poison FAST Version will require a change in the light cycle (typically from a longer “day” to a shorter one) to initiate flowering when grown indoors. This gives the grower more control over when the plant transitions from vegetative growth to flowering, which can be useful if you want to shape the plant’s size before it starts producing buds.

The breeder data does not specify its flavour, yield level, or exact THC content. However, its genetics clearly tie it closely to the Green Poison line, and the use of Green Poison Auto in the cross explains the “fast” character: the aim is to merge the quicker timing of autos with the flexibility and structure of a photoperiod plant.

Green Poison FAST Version may appeal if you:

• Prefer feminized, photoperiod seeds
• Want more control over growth and training than an auto typically allows
• Like the idea of a quicker photoperiod strain related to Green Poison
• Are comfortable managing light schedules (indoors) or seasonal timing (outdoors)

5. Key Differences

General Comparison

The most important difference between Green Poison Auto and Green Poison FAST Version is their growth behaviour:

• Green Poison Auto flowers automatically and does not depend on light cycle changes. This simplifies the process and often shortens the total time from seed to harvest.
• Green Poison FAST Version is a feminized photoperiod hybrid that still needs a change in lighting (indoors) or natural season changes (outdoors) to start flowering, but is bred to complete flowering faster than typical photoperiod strains.

Both are hybrids from Sweet Seeds and share Green Poison as a core parent, but the Auto uses Big Devil #2 in its cross, while the FAST Version is essentially Green Poison refined with Green Poison Auto genetics. That means they sit in the same family but are tuned for different cultivation styles.

Which Is Better for Beginners?

For a true first-time grower, Green Poison Auto is generally the simpler choice:

• You do not have to manage light cycle switches indoors.
• The plant will move into flowering on its own after a short growth phase.
• The breeder describes its yield as “good,” offering a reassuring balance of ease and productivity for beginners.

Green Poison FAST Version is still beginner-friendly in many setups, but it introduces a few extra decisions:

• You must know when and how to change the light schedule indoors.
• Plants can stay in vegetative growth as long as you keep them under long days, which can be an advantage but also something to manage.

If you’re new and want to minimise variables, Green Poison Auto is likely more forgiving. If you’re a beginner but keen to learn basic photoperiod techniques and don’t mind handling a light schedule, the FAST Version can be a gentle entry into that world, with the added benefit of a shorter flowering period than traditional photoperiod lines.

Yield Comparison

The only specific yield-related information provided is that Green Poison Auto offers a “good” yield. This suggests that for an autoflower, it is reasonably productive and should satisfy most small to medium home grows.

For Green Poison FAST Version, no explicit yield rating is given. However, its nature as a feminized photoperiod “fast” strain implies that it aims to balance speed with the typically higher yield potential of photoperiod plants. In many photoperiod vs auto comparisons, photoperiod strains can be trained and vegged longer to increase size and potential harvest. If Green Poison FAST Version follows that general pattern, experienced growers may be able to coax more from it than from an auto, but this will depend heavily on technique, veg time, and environment.

If you are a new grower looking for predictable results, you have a clearer expectation with Green Poison Auto: a good yield with minimal complexity. If you’re more yield-driven and understand photoperiod training and plant management, the FAST Version may give you more room to push plants for bigger harvests, though this isn’t explicitly guaranteed by the breeder data.

Effects Comparison

The breeder notes that Green Poison Auto has strong THC. While no detailed effect description is provided, strong THC usually corresponds to a more intense, pronounced experience. As a hybrid, the effect profile is likely to be balanced rather than purely sedating or purely uplifting, but the exact character is not specified.

For Green Poison FAST Version, no THC or effects information is given. However, given its direct link to the Green Poison lineage and its purpose as a fast photoperiod hybrid, it is reasonable to see it as part of the same family of potent hybrids, even though we do not have explicit strength data to compare.

If you are specifically seeking strong effects and want the most clearly defined choice based on the available information, Green Poison Auto is the only one with a confirmed strong THC description. The FAST Version may also be potent, but that is not stated in the provided data, so it is better to see it as an unknown in terms of exact effect strength.

6. Which Should You Choose?

Here is how to decide between the two based on your priorities:

• First-time grower, wants an easy start: Green Poison Auto is the more straightforward option. The autoflowering nature reduces the need to manage lighting changes and timing, and a “good” yield plus strong THC gives you a clear idea of what to expect.
• User looking for strong effects: Based on the data provided, Green Poison Auto explicitly mentions strong THC, making it the safer pick if you are prioritising intensity of effect.
• Beginner looking for easy cultivation but willing to learn: If you are comfortable learning how to switch light cycles and want to understand photoperiod growing from the start, Green Poison FAST Version can be interesting. It introduces core skills like timing the flip to flowering, while still aiming for a faster crop than many standard photoperiod strains.
• Grower focused on high yield with some experience: While Green Poison Auto is rated with a good yield, experienced growers often favour photoperiod strains like Green Poison FAST Version when chasing maximum production, because they can extend the vegetative period and use training techniques. If you already have some grows under your belt and want to shape plant size and structure for potentially higher yields, the FAST Version is likely the more flexible tool.
• Small spaces, discreet or quick runs: Autos like Green Poison Auto generally suit compact setups and faster, more straightforward runs. You can keep lights on a simple schedule and let the plants do their thing.

7. Final Thoughts

Green Poison Auto and Green Poison FAST Version are two closely related hybrids tailored to different grow styles. Green Poison Auto favours simplicity, fast automatic flowering, a sweet-and-fruity skunk-tinged flavour, and confirmed strong THC with good yields, making it very attractive for beginners and users who prioritise powerful effects without complex cultivation.

Green Poison FAST Version keeps you in the photoperiod world but aims to shorten the flowering window, offering more control over plant size and potential yield to growers who are comfortable managing light cycles. If you value ease and clarity, the Auto is likely your best match; if you want more control and are willing to manage a photoperiod, the FAST Version may fit your long-term goals better.