Big Devil FAST Version vs Black Muffin F1 Fast Version: Which Feminized Fast Strain Is Right for You?

1. Introduction

When you are choosing between two fast-flowering feminized cannabis seeds from the same breeder, it often comes down to the finer details of how they grow and what kind of experience you want from the final harvest. Big Devil FAST Version and Black Muffin F1 Fast Version, both from Sweet Seeds, are designed to deliver strong effects while keeping flowering times short and cultivation relatively straightforward.

This comparison focuses on what first-time growers, yield-focused cultivators, and users looking for strong effects can realistically expect from each option, based only on the confirmed information available. Where exact numbers are not provided, the guidance remains general so you can make a choice without relying on guesses or exaggerated claims.

2. Quick Comparison Table

Feature	Big Devil FAST Version	Black Muffin F1 Fast Version
Breeder	Sweet Seeds	Sweet Seeds
Seed Type	Feminized	Feminized
Type	Hybrid	Indica
Genetics	Big Devil Auto crossed with a secret strain	Not specified
Flowering Time	Not specified	Approx. 7 weeks
THC	Strong	Strong (about 17–25%)

3. Big Devil FAST Version Overview

Big Devil FAST Version is a feminized hybrid from Sweet Seeds created by crossing Big Devil Auto with a secret photoperiod strain. This background suggests the aim was to keep the fast traits and strong impact of an autoflower line while adapting it to a quicker photoperiod format.

As a hybrid, Big Devil FAST Version is positioned between indica and sativa influences. Without specific data on flavour, effects profile, or yield, the safest assumption is that it aims for a balanced overall experience rather than leaning heavily toward either uplifting or heavily sedating territory. The THC is described simply as strong, so it is intended for users who want a noticeable, potent effect rather than a very mild one.

The “FAST Version” label tells you the flowering phase is bred to be shorter than a conventional photoperiod strain. While exact weeks are not listed, this is typically attractive to growers who want a quicker turnaround or who have seasons or schedules that do not allow long flowering times. As feminized seeds, Big Devil FAST Version should greatly reduce the need for sexing plants, which helps new growers avoid the common mistake of leaving males in the grow space.

Because neither yield nor cultivation difficulty is specified, it is best to approach this strain as a general-purpose hybrid: suitable for a range of grow setups, but without documented emphasis on extremely high production or ultra-compact growth. If you are a first-time grower, the hybrid nature plus feminization and fast flowering can be reassuring, but you may want to pair that with basic grow research and modest expectations for your first run.

4. Black Muffin F1 Fast Version Overview

Black Muffin F1 Fast Version is another feminized fast seed from Sweet Seeds, but this one is classified as an indica. The exact genetic mix is not specified, but the “F1 Fast Version” and indica type point to a focus on a short, controlled flowering phase and a more indica-leaning outcome in structure and effects.

Here, the flowering time is clearly stated at around 7 weeks, which is quite short for a photoperiod plant. This precise figure gives you something concrete for planning your grow cycle, especially if you are constrained by climate, rental timing, or indoor rotation schedules. A seven-week flowering period can mean an earlier harvest window compared with many longer-flowering varieties.

Black Muffin F1 Fast Version is also described as having strong THC, with a specified range of about 17–25%. This places it squarely in the higher-potency segment, suited to users who already tolerate robust effects or who are specifically seeking a powerful outcome. With no detailed description of the effect style, it is safest to treat it simply as a strong indica-type option rather than assuming any specific mood or sensory profile.

Yield information is not provided, so while the fast flowering is a plus for timing, you should not assume unusually high or low production. As with Big Devil FAST Version, feminized seeds lower the risk of male plants, which is helpful for less experienced cultivators, and the indica classification may appeal to those who prefer plants that generally stay more compact compared to many sativa-leaning lines.

5. Key Differences

General Comparison

The most obvious contrast is type: Big Devil FAST Version is a hybrid, while Black Muffin F1 Fast Version is an indica. This difference often matters to users who have a preference for a more middle-ground experience (hybrid) versus a more traditionally indica-leaning one. Even though the precise effects are not detailed, this classification is still useful when matching a strain to your general preferences.

Another clear difference is the transparency around flowering time. Black Muffin F1 Fast Version is documented at about 7 weeks, but Big Devil FAST Version has no exact figure listed, only the “FAST Version” branding. If your planning demands a clear calendar, Black Muffin gives you more certainty.

Both strains are feminized and described as strong in THC, but only Black Muffin F1 Fast Version has an approximate THC percentage range (17–25%). That level of detail may matter if you specifically want to stay within a particular potency band.

Which Is Better for Beginners?

For a first-time grower, there are a few angles to consider:

• Predictability of timing: Black Muffin F1 Fast Version’s 7-week flowering time provides a concrete schedule, which can be very comforting for someone planning their first grow. Big Devil FAST Version is also a fast line, but without a stated number of weeks.
• Plant type: Indica strains, like Black Muffin F1 Fast Version, are often chosen by beginners who want shorter, more manageable plants, especially in small indoor spaces. The hybrid nature of Big Devil FAST Version may suit those who do not mind a potentially more mixed growth pattern.
• Potency: Both are strong. For new consumers of cannabis, this means taking a cautious approach to dosage with either strain. The known 17–25% range of Black Muffin F1 Fast Version confirms clearly that it is in a high-potency bracket.

Considering these factors, beginners who value clear timing and a classic indica type may find Black Muffin F1 Fast Version slightly more straightforward to plan around. However, novice growers who prefer a hybrid character and are flexible about exact flowering length may lean toward Big Devil FAST Version.

Yield Comparison

Neither product lists specific yield data. This means there is no reliable numerical comparison of grams per square metre or per plant. Without that, it would be misleading to claim that one is definitely more productive than the other.

If yield is your primary concern, you will need to base your decision on indirect clues rather than hard figures:

• The fast flowering nature of both lines suggests they are bred for shorter cycles rather than maximising long, extended flowering periods that sometimes accompany very high yields.
• Indicas like Black Muffin F1 Fast Version often appeal to growers who want dense, compact plants, but that does not automatically mean more weight compared with a hybrid such as Big Devil FAST Version.

In practical terms, both strains can be viewed as yield-neutral based on the available information. Your grow environment, nutrition, and training methods are likely to have a bigger impact on final output than the small differences between these two particular seeds.

Effects Comparison

Both strains are described broadly as having strong THC, but only Black Muffin F1 Fast Version specifies a range (17–25%). Big Devil FAST Version has no percentage attached, only the general “strong” label.

The main distinctions you can rely on are:

• Big Devil FAST Version: Hybrid type. Expect a mixed-profile strain rather than one clearly defined by either end of the indica–sativa spectrum.
• Black Muffin F1 Fast Version: Indica type with clearly strong THC levels. This points to an effects profile that is firmly on the more potent side within the indica family, without venturing into specific mood or body descriptors.

If your primary concern is simply that the strain should be powerful, both products fit that requirement. If you want a confirmed higher potency band with a stated percentage range, Black Muffin F1 Fast Version gives you more clarity.

6. Which Should You Choose?

The better choice depends on what you value most:

• You want a clear, short flowering schedule and a defined potency range:
  Black Muffin F1 Fast Version is the more transparent option, with its ~7-week flowering time and 17–25% THC range. This can be very useful if you are planning a tight schedule or aiming for a reliably strong harvest.
• You prefer hybrid character and are comfortable with a more general timeline:
  Big Devil FAST Version suits growers and users who like a hybrid approach and do not need an exact week count for flowering. The cross of Big Devil Auto with a secret strain hints at a design that blends fast traits with hybrid versatility.
• For first-time growers:
  Both are feminized and fast, which are big advantages. Black Muffin F1 Fast Version may edge ahead for those who want predictable timing and a classic indica type, while Big Devil FAST Version can appeal if you want a hybrid experience and are willing to adapt to its unspecified, but still fast, flowering phase.
• If yield is your main metric:
  There is no direct yield data for either strain, so you should not choose one over the other solely on assumed production. In this situation, it makes sense to pick based on plant type (hybrid vs indica) and your preferred effects style, then focus on optimising your grow conditions to maximise whatever strain you choose.

7. Final Thoughts

Both Big Devil FAST Version and Black Muffin F1 Fast Version are strong, fast, feminized options from Sweet Seeds, making them appealing to beginners and experienced growers alike. The main dividing lines are hybrid versus indica character, the level of detail given on flowering time and THC, and how much you value precise planning versus flexibility.

If you want clear numbers and an indica-type plant with well-defined strong potency, Black Muffin F1 Fast Version is the more transparent choice. If you are drawn to a hybrid lineage and are comfortable working with a generally fast, but unspecified, flowering period, Big Devil FAST Version is a solid alternative. In either case, matching the strain to your grow setup and personal tolerance for strong effects will be more important than any small differences between the two.