Purple OG #18 vs The OG #18: Which Feminized Strain Suits You Best?
1. Introduction
Purple OG #18 and The OG #18 are closely related feminized hybrids from the same breeder, Reserva Privada. Both are known for strong THC potential and “good” yields, making them attractive to growers seeking powerful effects and solid harvests. However, their genetics and flowering times differ slightly, which can influence how suitable each one is for beginners, yield-focused growers, and users looking for particularly strong effects.
This comparison looks at the key data available for both strains to help you decide which one fits your experience level, grow space, and priorities.
2. Quick Comparison Table
| Feature | Purple OG #18 | The OG #18 |
|---|---|---|
| Breeder | Reserva Privada | Reserva Privada |
| Seed Type | Feminized | Feminized |
| Type | Hybrid | Hybrid |
| Genetics | The OG #18 x Purple Wreck | OG Kush S1 pheno |
| Flowering Time | 8–9 weeks | 9 weeks |
| Yield | Good | Good |
| THC | Strong | Strong |
3. Purple OG #18 Overview
Purple OG #18 is a feminized hybrid created by crossing The OG #18 with Purple Wreck. This combination brings together the well-known OG line with a purple twist, while keeping the focus on strong THC levels and a solid overall performance in the grow room.
As a hybrid, Purple OG #18 aims to balance different cannabis characteristics rather than leaning heavily toward one side of the spectrum. The breeder lists the flowering time at around 8–9 weeks, which is slightly quicker or at least comparable to many modern hybrids. This shorter window can be useful if you want to finish a grow a bit earlier or fit more cycles into a year.
Yield is rated as “good,” indicating that, under reasonable conditions, growers can expect respectable results without needing to chase extreme production at the cost of quality. Combined with a “strong” THC rating, Purple OG #18 is positioned as a strain that offers both potency and worthwhile returns, rather than sacrificing one for the other.
Because it is feminized, growers do not need to identify and remove male plants, which simplifies the process and reduces the risk of accidental pollination. This can be particularly helpful for first-time growers who want to keep the process straightforward.
While specific flavour, aroma, and effect details are not listed in the data provided, the presence of both The OG #18 and Purple Wreck in its background suggests that Purple OG #18 is intended for users who value strong, impactful experiences rather than subtle or very mild effects.
4. The OG #18 Overview
The OG #18 is another feminized hybrid from Reserva Privada, bred from an OG Kush S1 phenotype. This line focuses firmly on the OG Kush heritage, which is known for strong, assertive effects and has long been popular among experienced users and growers.
The OG #18 has a listed flowering time of around 9 weeks, placing it slightly on the longer side compared with Purple OG #18’s 8–9 week window. That single extra week may not be a major issue for many growers, but it can matter if you are working on a tight schedule or want to rotate harvests frequently.
Like Purple OG #18, The OG #18 offers a “good” yield, suggesting that it balances production and potency instead of focusing exclusively on maximum volume. The strong THC indication confirms that this strain, too, is designed for pronounced effects, which makes it attractive to users who prefer powerful experiences.
With its OG Kush S1 pheno genetics and feminized format, The OG #18 is aimed at growers who want to work with the OG family without dealing with male plants. The feminized nature makes planning your grow easier and more predictable, especially in smaller spaces where every plant counts.
No specific information is provided here about its aroma or the exact character of its effects, but given its origin, The OG #18 is clearly meant for those who appreciate potent hybrid strains and want to stay close to classic OG Kush traits.
5. Key Differences
General Comparison
Although both strains are feminized hybrids from the same breeder and share a strong THC profile with good yields, they are not identical:
- Genetics: Purple OG #18 combines The OG #18 with Purple Wreck, while The OG #18 comes from an OG Kush S1 pheno. Purple OG #18 therefore introduces an additional parental line, which may influence structure, colouring, and overall character, while The OG #18 stays focused on OG Kush genetics.
- Flowering Time: Purple OG #18 is listed at 8–9 weeks, potentially finishing a bit earlier than The OG #18, which is more firmly placed at 9 weeks.
- Lineage Style: Purple OG #18 is effectively a variation building on The OG #18 plus Purple Wreck, whereas The OG #18 is the more direct representative of the OG Kush S1 genetic line.
Which Is Better for Beginners?
Both strains are feminized and rated with “good” yields, which is generally favourable for newer growers. The absence of regular (male) seeds makes it easier to set up a small grow without worrying about sexing plants.
For a first-time grower, two points stand out:
- Slightly Faster Flowering: Purple OG #18’s 8–9 week window can be advantageous if you are just starting and want to see results a bit sooner. A shorter cycle means less time waiting and potentially fewer chances for issues to arise late in flowering.
- Close Genetic Tie to OG: The OG #18, being an OG Kush S1 pheno, may appeal more to growers who specifically want to work with a more direct OG Kush-style line from the outset and are comfortable with the full 9-week cycle.
Based on the available data, Purple OG #18 is slightly more beginner-friendly simply because of its flexible 8–9 week flowering time and its hybrid nature that builds on an already established OG line.
Yield Comparison
Both Purple OG #18 and The OG #18 are described as offering a “good” yield. There is no indication that one clearly outperforms the other in terms of raw production. Since they share a similar yield description and both come from a breeder known for productive lines, it is reasonable to treat them as roughly comparable in harvest potential under similar conditions.
Without more detailed yield metrics, your choice as a yield-focused grower will likely come down to:
- Whether you prefer the slightly shorter flowering range of Purple OG #18, which could allow more frequent harvests over time.
- Or whether you want to stick with The OG #18 for its direct OG Kush S1 lineage, relying on training and grow techniques to maximise its “good” yield.
In other words, yield alone is not a decisive differentiator here; both are positioned similarly on that front.
Effects Comparison
Both strains are described simply as having “strong” THC, with no further breakdown of their specific effects. This indicates that either choice is aimed at users looking for pronounced potency rather than mellow or very light experiences.
With the data provided, it is not possible to accurately state that one is more relaxing, uplifting, or energising than the other, nor to assign particular effect profiles beyond strong THC. However, the genetic backgrounds offer some general guidance in terms of intended audience:
- Purple OG #18: By combining The OG #18 with Purple Wreck, this strain is likely designed for those who want a potent experience rooted in the OG family but with an added twist from the purple side of its lineage.
- The OG #18: Built directly from an OG Kush S1 pheno, this option will appeal to people who want a strong, classic OG-style hybrid, with effects firmly anchored in that family.
For users primarily seeking strong effects, both strains are appropriate choices. The decision may come down to whether you prefer a variant that mixes in additional genetics (Purple OG #18) or a line that stays close to a single, recognised OG Kush phenotype (The OG #18).
6. Which Should You Choose?
Your ideal choice depends on your priorities as a grower and as a consumer of the final product.
- First-time grower or beginner: Purple OG #18 is slightly better suited thanks to its 8–9 week flowering schedule, which is a touch more forgiving in terms of timing. The feminized format and “good” yield keep things straightforward.
- User looking for strong effects: Both strains are indicated as “strong” in THC. If you value having a variant with an extra parental line, Purple OG #18 may appeal more. If you prefer to stay close to the core OG Kush S1 characteristics, lean toward The OG #18.
- Beginner looking for easy cultivation: With the limited data available, neither strain is presented as especially difficult. The slightly shorter potential flowering time gives Purple OG #18 a small edge in simplicity and speed, which many new growers appreciate.
- Grower focused on high yield: Since both are listed with “good” yields and no additional yield-specific data is provided, you can treat them as roughly equal in production. In that case, factor in flowering time and genetic preference: Purple OG #18 for a potentially faster turnaround, The OG #18 for more direct OG Kush lineage.
- Fans of OG genetics: If your primary goal is to explore OG Kush-style plants in as direct a way as possible, The OG #18, with its OG Kush S1 pheno background, is the more straightforward choice.
7. Final Thoughts
Purple OG #18 and The OG #18 share a lot of similarities: both are feminized, hybrid, strong-THC strains from Reserva Privada, each offering a good yield. The main separating factors are their genetics and a slight difference in flowering time.
If you want a faster cycle and an OG-based hybrid that incorporates an additional parental line, Purple OG #18 is a sensible pick, especially for beginners. If maintaining a closer connection to an OG Kush S1 phenotype is more important to you, and you are comfortable with a firm 9-week flowering period, then The OG #18 may be the better match.
Ultimately, both strains can suit growers who want strong effects and reliable harvests; your decision should focus on how much you value a slightly shorter flowering window versus a more direct OG Kush heritage.
