Big Devil XL Auto vs Big Devil FAST Version: Which Sweet Seeds Strain Fits You Best?
1. Introduction
Big Devil XL Auto and Big Devil FAST Version are two related hybrids from Sweet Seeds that appeal to growers who want strong effects and straightforward cultivation. Both carry the Big Devil name and offer potent THC levels, but they differ in how they grow and how you manage them. This comparison focuses on what matters most if you are a first-time grower, a buyer comparing strains before purchase, or a grower focused on getting a solid yield with strong effects.
2. Quick Comparison Table
| Feature | Big Devil XL Auto | Big Devil FAST Version |
|---|---|---|
| Breeder | Sweet Seeds | Sweet Seeds |
| Seed Type | Autoflowering | Feminized (non-auto) |
| Genetics | Big Devil #2 × Jack Herer Auto | Big Devil Auto × mystery strain |
| Type | Hybrid | Hybrid |
| THC | Strong | Strong |
| Flowering / Life Cycle | Autoflowering | Fast, photoperiod (fast version) |
| Yield | Good | Not specified |
| Aroma / Flavour | Incense and citrus lemon | Not specified |
3. Big Devil XL Auto Overview
Big Devil XL Auto is Sweet Seeds’ autoflowering take on the Big Devil line, created by crossing Big Devil #2 with Jack Herer Auto. As an auto hybrid, it flowers automatically without requiring changes in the light cycle, which is especially appealing if you are new to growing or want a simpler setup.
This strain is described as a hybrid with strong THC, so you can expect pronounced effects rather than something mild. While the exact effect profile is not specified, the emphasis on potency suggests it is aimed at users who want a noticeable, strong experience rather than a subtle one.
In terms of production, Big Devil XL Auto is rated as having a good yield. For a first-time grower or anyone focused on output, this “good” yield potential is a reassuring indication that, when grown in reasonable conditions, it can reward your efforts without being overly demanding or complex.
One of the more distinctive aspects of Big Devil XL Auto is its flavour and aroma. Growers can expect an incense-like profile paired with citrus lemon notes. This can be attractive if you enjoy more complex aromatic profiles that are not purely fruity or sweet. The combination of incense and citrus often translates into a fresh yet slightly spicy character that many users find interesting.
Because it is autoflowering, Big Devil XL Auto tends to be more forgiving about light schedules and timing. You do not need to manage a strict 12/12 light cycle to trigger flowering, which can simplify your first grow. This can be a key factor if you are just starting out or running a small home setup where convenience and reliability matter more than fine-tuned control.
4. Big Devil FAST Version Overview
Big Devil FAST Version is a feminized, fast-flowering hybrid from Sweet Seeds. It is bred by crossing Big Devil Auto with a mystery strain, designed to retain the Big Devil character in a quicker photoperiod package. Unlike the XL Auto, this is not an autoflower; it behaves like a standard feminized plant that depends on changes in light to flower, but with an accelerated flowering time compared to regular photoperiods in the same family.
While exact flowering duration, yield levels, flavour, and detailed effects aren’t specified, a “FAST Version” generally aims to shorten the indoor flowering phase or outdoor finishing time, which can be valuable in climates with shorter seasons or for growers looking to turn crops around faster.
Big Devil FAST Version is also described as having strong THC. This makes it a suitable choice for users who prioritise potent effects. Since it is a hybrid, growers and users can expect a balanced style of plant growth and effect profile rather than something extremely narrow.
As a feminized strain, it is bred to produce female plants, which simplifies cultivation compared to regular seeds, where you must identify and remove males. However, because it is photoperiod dependent, you do need to manage the light cycle (or rely on seasonal changes outdoors) to bring it into flowering, which adds a layer of timing and planning compared with an automatic variety.
5. Key Differences
General Comparison
The most important divide between these two Sweet Seeds strains is how they grow:
- Big Devil XL Auto is an autoflowering hybrid. It begins flowering on its own after a certain period, regardless of light schedule. This generally makes it simpler to manage, especially indoors or on balconies where controlling light can be tricky.
- Big Devil FAST Version is a fast, feminized, photoperiod hybrid. It still needs a specific light cycle to flower, but it is bred to finish more quickly than typical photoperiod lines in the same family.
Genetically, Big Devil XL Auto includes Jack Herer Auto in its lineage, suggesting an additional influence on aroma and structure, while Big Devil FAST Version uses a mystery strain with Big Devil Auto, aiming to speed up flowering while maintaining the core character of the Big Devil line.
Which Is Better for Beginners?
For a true first-time grower, Big Devil XL Auto is usually the more straightforward option. Being autoflowering means:
- No need to change lighting schedules to trigger flowering.
- Less risk of stress caused by light leaks or timing mistakes.
- A generally more “set and forget” style of cultivation.
In contrast, Big Devil FAST Version may suit someone who has at least a basic understanding of photoperiod plants. You will need to:
- Manage or respect a proper light cycle (typically 12/12 indoors) to initiate and maintain flowering.
- Pay more attention to timing, especially if you want to coordinate harvest dates or stagger multiple runs.
That said, the FAST Version is still feminized, which reduces complexity vs. regular seeds. If you are a beginner who is willing to learn basic light management and wants to experience a fast photoperiod grow, it can still be a viable choice. But if your priority is an easy, forgiving introduction to cultivation, Big Devil XL Auto has the edge.
Yield Comparison
Big Devil XL Auto is rated as having a good yield. While exact figures are not provided, this suggests that, within the context of autoflowering strains, it can produce a satisfactory amount of flowers when given decent conditions.
For Big Devil FAST Version, specific yield information is not listed. However, fast photoperiod strains are often bred to combine shorter flowering with reasonable production. Because the yield is not specified here, it’s safer to say that if yield is your top priority and you want a more predictable outcome based on the available data, Big Devil XL Auto is the more transparent choice.
Growers who are very focused on maximising harvest weight and are comfortable with photoperiod techniques may still be drawn to the FAST Version, but they should be prepared to adjust their expectations based on their setup, since concrete yield data is not available.
Effects Comparison
Both strains are described simply as having strong THC. No detailed breakdown of the effects (such as whether they lean more relaxing or uplifting) is provided for either one, so we cannot draw a precise comparison in terms of specific sensations.
However, some general points can still help decision-making:
- Both are hybrid strains, so neither is at the extreme end of the spectrum in terms of plant type.
- The label “strong” for THC on both indicates that users should expect potent effects rather than something very mild or beginner-strength.
- Because Big Devil XL Auto has Jack Herer Auto as part of its genetics, some users might anticipate a more nuanced profile influenced by that parentage, but the exact effect description is not provided and shouldn’t be assumed.
If your main goal is a strong, noticeable experience, both strains are positioned to meet that requirement. The real differentiation is how they grow, not the intensity of the effects.
6. Which Should You Choose?
Your choice between Big Devil XL Auto and Big Devil FAST Version should be guided by your experience level, grow conditions, and priorities.
- Choose Big Devil XL Auto if:
- You are a first-time grower or still fairly new to cultivation.
- You want to avoid dealing with light schedule changes and prefer the simplicity of an autoflower.
- You value a clearly described “good” yield from the available data.
- Incense and citrus lemon aromas appeal to you and you want a defined flavour profile.
- You want a strong-THC hybrid without managing the extra variables of photoperiod timing.
- Choose Big Devil FAST Version if:
- You are comfortable managing photoperiod plants or willing to learn about light schedules.
- You want a fast-flowering feminized strain rather than an autoflower.
- You prefer the control that comes with deciding exactly when to trigger flowering (indoors) or you grow outdoors in a region where an earlier finish is valuable.
- You’re interested in exploring another expression of the Big Devil line with strong THC in a quick photoperiod format.
7. Final Thoughts
Both Big Devil XL Auto and Big Devil FAST Version carry Sweet Seeds’ Big Devil genetics and are designed for growers who appreciate potent hybrids. Big Devil XL Auto stands out as the more beginner-friendly option, with a clear note of good yield and a defined incense-and-lemon aroma. Big Devil FAST Version, on the other hand, suits growers who like the idea of a fast, feminized photoperiod strain and are prepared to handle light management.
If ease of cultivation and predictable results are your main goals, Big Devil XL Auto is likely to be the safer choice. If you’re aiming for a quick-turnaround feminized grow and don’t mind a bit more involvement, Big Devil FAST Version offers a fast alternative within the same strong-THC family.
