Green Poison FAST Version vs Killer Kush Fast Version: Which Feminized Hybrid Is Right for You?

1. Introduction

Choosing between two fast-flowering feminized hybrids from the same breeder can be tricky, especially if you’re a first-time grower or you’re mainly looking for strong, impactful effects. Green Poison FAST Version and Killer Kush Fast Version both come from Sweet Seeds and both use photoperiod genetics blended with autoflowering lines to speed up flowering. Despite these similarities, they lean in slightly different directions in terms of flavour, structure and what type of grower they suit best.

This comparison focuses on general differences, suitability for beginners, yield potential and how their effects are likely to compare based on their genetic background.

2. Quick Comparison Table

Feature	Green Poison FAST Version	Killer Kush Fast Version
Breeder	Sweet Seeds	Sweet Seeds
Seed Type	Feminized	Feminized
Type	Hybrid	Hybrid
Genetics	Green Poison × Green Poison Auto	OG Kush × Auto Indica
Flowering Time	Fast version (exact time not specified)	Approx. 7 weeks
Yield	Not specified	Good
Flavour / Aroma	Not specified	Sweet, tangy citrus with chemical, diesel and kush notes

3. Green Poison FAST Version Overview

Green Poison FAST Version is a feminized hybrid from Sweet Seeds that combines the original Green Poison with Green Poison Auto genetics. The result is a fast-flowering photoperiod strain designed to shorten the wait between switching to 12/12 and harvest compared to standard varieties.

Because it’s a “fast version,” it typically behaves like a regular photoperiod plant in terms of growth and training, but with a significantly reduced flowering window thanks to the autoflowering influence. This can be particularly appealing if you want to:

• Turn over more cycles per year in an indoor grow
• Reduce the outdoor risk window near harvest time
• Balance yield and speed without going fully autoflower

The breeder lists it simply as a hybrid, and while detailed numbers like THC content, yield range or terpene profile are not specified here, its Green Poison backbone suggests a focus on robust, straightforward plants with a generally strong effect profile. However, without exact data, it’s best to think of Green Poison FAST Version as a versatile, balanced hybrid with an emphasis on a short bloom phase and feminized reliability rather than as a strain chosen for a very specific flavour or effect niche.

4. Killer Kush Fast Version Overview

Killer Kush Fast Version is another feminized fast-flowering hybrid from Sweet Seeds, but this time built from OG Kush crossed with an Auto Indica. It keeps the photoperiod nature while pulling some speed from the automatic side, with a breeder-listed flowering time of about 7 weeks.

The flavour and aroma are much more clearly defined here: a sweet and tangy citrus taste layered over chemical, diesel and classic kush notes. For growers or consumers who care a lot about terpene character, Killer Kush Fast Version stands out as the more aromatic option between the two based on the data available.

Sweet Seeds describes the yield simply as “good,” suggesting that, within its fast-flowering window, productivity is still a key feature. While exact numbers are not given, “good” yield paired with a 7-week bloom makes this strain appealing if you want a balance of:

• Recognisable OG Kush-style profile
• Short flowering time
• Solid production for a fast hybrid

The OG Kush × Auto Indica genetics also point toward potent, substantial effects, though no specific THC percentage or effect breakdown is provided here. It’s reasonable to view Killer Kush Fast Version as a fast, kush-influenced hybrid tailored to those who appreciate bold flavours and impactful experiences.

5. Key Differences

General Comparison

Both strains are feminized, fast-flowering hybrids from the same breeder, but they are built around different parent lines:

• Green Poison FAST Version continues the Green Poison line with an added autoflowering component from Green Poison Auto.
• Killer Kush Fast Version leans heavily into OG Kush heritage blended with Auto Indica genetics.

In practical terms, that means:

• Killer Kush Fast Version has clearly defined flavour notes (citrus, diesel, kush), making it a better fit if aroma and taste are a priority.
• Green Poison FAST Version is more of an all-rounder in this comparison, focusing on fast flowering and hybrid balance rather than a specific flavour profile, at least based on the information available.

Which Is Better for Beginners?

For a first-time grower, the main considerations are simplicity, predictability and margin for error.

Both of these strains are feminized fast versions, so they avoid male plants and tend to finish quicker than standard photoperiods, which is already a plus for beginners. Without explicit difficulty ratings, we can infer suitability based on genetics and available information:

• Green Poison FAST Version may appeal to new growers who want a straightforward hybrid with fewer strong flavour expectations. Its Green Poison background is often associated with robust, user-friendly plants, and fast flowering means fewer weeks to maintain perfect conditions.
• Killer Kush Fast Version, with OG Kush heritage, can be attractive but OG lines are sometimes more sensitive to conditions, feeding and training. While this isn’t guaranteed here, beginners should be prepared to pay closer attention to environment and nutrient balance, especially if aiming to maximise its “good” yield potential.

If you’re completely new and prefer a simple, fast run without chasing specific terpene traits, Green Poison FAST Version is likely the safer, more forgiving choice. If you’re a beginner but willing to learn and you’re particularly motivated by Kush-style flavour and a compact 7-week flowering window, Killer Kush Fast Version can still be suitable, just with a potentially steeper learning curve.

Yield Comparison

Yield is a key factor for many growers, especially if you’re investing in equipment or only have space for a limited number of plants.

• Killer Kush Fast Version is explicitly described as offering a “good” yield. While that’s not a precise figure, it signals that productivity is one of its selling points even with the 7-week flowering time.
• Green Poison FAST Version doesn’t have yield data listed here, so we can’t quantify or directly compare. As a fast hybrid based on Green Poison, it’s reasonable to expect it to aim for a balance between speed and output, but there’s no concrete yield description provided.

If you’re heavily focused on yield and want at least some reassurance in that area, Killer Kush Fast Version has the clearer yield indication. Green Poison FAST Version may still be productive, but you’re making more of a leap without published yield guidance in this data.

Effects Comparison

Neither strain has specific effect descriptions or THC values listed, so any comparison must rely only on their genetic background, not on quantified potency.

• Killer Kush Fast Version comes from OG Kush × Auto Indica. OG Kush is widely known for strong, notable effects and a heavy terpene profile. While we can’t state exact strength, this heritage suggests it will likely appeal to users looking for pronounced, impactful experiences, especially combined with its rich, citrus-diesel-kush aroma.
• Green Poison FAST Version, based on Green Poison genetics with added autoflower influence, can be seen as a more balanced hybrid option. Without precise data, it’s best to think of its effects as hybrid-style rather than strongly tilted to one side, potentially suiting users who want a general-purpose strain rather than a highly specific effect profile.

If you are specifically seeking robust, kush-style effects and intense flavour, Killer Kush Fast Version seems more tailored to that role. If you want a hybrid that doesn’t lean as strongly into one particular terpene or effect niche (at least from the available information), Green Poison FAST Version is the more neutral choice.

6. Which Should You Choose?

Your decision will come down to your priorities as a grower and consumer: ease, yield, flavour and desired effect style.

• Choose Green Poison FAST Version if:
  • You’re a first-time grower seeking an uncomplicated, feminized fast hybrid.
  • You value a short flowering period but don’t need a highly specific flavour profile.
  • You prefer a balanced, general-use hybrid rather than a strongly kush-oriented strain.
  • You want a reliable introduction to fast versions without focusing on complex terpene nuances.
• Choose Killer Kush Fast Version if:
  • You care strongly about flavour and want citrus, diesel and kush notes.
  • You’re looking for “good” yield within a clearly defined 7-week flowering time.
  • You’re a user who tends to prefer powerful, kush-style experiences.
  • You’re a beginner who is willing to pay attention to your grow to make the most of OG Kush-based genetics, or you already have a bit of cultivation experience.

If you mainly want strong effects and bold aroma, Killer Kush Fast Version is the more focused option. If your top priority is a straightforward first grow with a fast finish and fewer pre-set expectations about flavour, Green Poison FAST Version is likely to feel more forgiving and flexible.

7. Final Thoughts

Both Green Poison FAST Version and Killer Kush Fast Version offer fast-flowering, feminized hybrid genetics from Sweet Seeds, making them attractive to new and experienced growers alike. The choice ultimately hinges on how much you prioritise kush-style flavour and a clearly “good” yield in a 7-week bloom (Killer Kush Fast Version) versus a more neutral, broadly usable fast hybrid with Green Poison lineage (Green Poison FAST Version).

For a first grow focused on simplicity, Green Poison FAST Version is a solid starting point. If you’re more driven by strong, kushy effects and distinct citrus-diesel terpenes, Killer Kush Fast Version is likely to be the better fit.