Purple OG #18 vs The OG #18: Which Feminized Hybrid Is Right for You?
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 levels and good yields, making them appealing to growers who want potent results from reliable genetics. However, their backgrounds and flowering times differ slightly, which can influence which one suits you better as a first-time grower, a yield-focused cultivator, or someone primarily interested in powerful effects.
This comparison breaks down the main differences between these two strains so you can choose the option that best fits your experience level, growing goals, and expectations around strength and cultivation time.
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 from Reserva Privada created by crossing The OG #18 with Purple Wreck. This pairing combines an OG-driven backbone with a Purple influence, resulting in a hybrid that keeps the strong THC levels associated with the OG line while introducing genetics from the Purple side.
The strain is designed as a feminized seed, so you can expect only female plants, which is helpful if you are just starting out and want to avoid dealing with males. Purple OG #18 has a reported flowering time of around 8–9 weeks. That slightly shorter window can be appealing if you want to complete a cycle a bit sooner, either to speed up your first harvest or to fit more runs into a year.
In terms of crop size, Purple OG #18 is rated as having a good yield. While there is no exact figure provided, this indicates it is capable of producing a respectable harvest when grown under suitable conditions. Combined with its strong THC classification, it’s a strain aimed at growers who want potency without sacrificing overall production.
Because it is a hybrid and not specified as particularly demanding, Purple OG #18 can be a reasonable choice for newer growers who are ready to work with a potent strain but still value a manageable flowering time and feminized seed format.
4. The OG #18 Overview
The OG #18 is also a feminized hybrid from Reserva Privada, but it leans heavily into classic OG genetics. It is described as an OG Kush S1 pheno, meaning it comes from selfed OG Kush lines. This gives it a more direct link to the traditional OG experience, which many buyers seek out when they want a strong, OG-style hybrid.
Like Purple OG #18, The OG #18 is feminized, removing the need to identify and remove male plants. This is convenient for first-time growers who want a straightforward path from seed to harvest. The strain’s flowering time is listed at about 9 weeks, placing it in a typical range for many indoor hybrids, though slightly longer than the lower end of Purple OG #18’s 8–9 week window.
The OG #18 is also described as having a good yield. While the exact production potential isn’t quantified, it suggests that, under proper conditions, growers can expect a solid harvest. Importantly for experienced users and those seeking strong effects, The OG #18 is characterized by strong THC levels, in line with the reputation of potent OG phenotypes.
With its OG Kush S1 pheno background, The OG #18 is often chosen by growers and consumers who specifically want that recognizable OG character along with reliable feminized seeds and robust potency.
5. Key Differences
General Comparison
Both strains are feminized hybrids from the same breeder and are rated as strong in THC with good yields. The main distinction is in their genetic makeup and slightly different flowering times:
- Purple OG #18 blends The OG #18 with Purple Wreck, adding a Purple lineage on top of the OG base.
- The OG #18 stays closer to classic OG Kush, being an OG Kush S1 pheno without additional cross lines listed.
This difference in lineage means Purple OG #18 is a hybrid of OG and Purple genetics, while The OG #18 presents a more direct OG expression. For buyers who care about genetic background and want a more “pure” OG-style seed, The OG #18 may feel more straightforward. Growers interested in an OG crossed with Purple heritage may find Purple OG #18 more appealing.
Which Is Better for Beginners?
For a first-time grower, simplicity, feminized seeds, and a reasonable flowering time matter a lot. Both strains are feminized, which is ideal for beginners because it reduces the risk of unintended pollination.
Where they diverge slightly is flowering duration:
- Purple OG #18 has a flowering time of about 8–9 weeks.
- The OG #18 is listed at around 9 weeks.
The difference is not huge, but Purple OG #18 may finish a bit sooner on average, especially if it leans toward the shorter end of its 8–9 week range. For a first-time grower impatient for their first harvest or working within a tight schedule, a potentially shorter flowering time can be an advantage.
Since neither product description flags a particularly high difficulty level, both can be considered accessible to beginners who are prepared to follow basic cultivation practices. However, if you want to slightly minimize time to harvest while still getting strong THC and good yields, Purple OG #18 edges ahead as the more beginner-friendly option based on the available data.
Yield Comparison
In terms of yield, both Purple OG #18 and The OG #18 are simply described as having a good yield. That suggests:
- Both strains are capable of producing respectable harvests.
- Neither is presented as a low-yield specialty strain nor as an extreme high-yield outlier in the data provided.
Because they are both rated similarly, the decision for yield-focused growers may come down more to how you manage your environment, training methods, and overall plant health rather than marked differences between the strains themselves.
If maximizing the number of harvests per year is a priority, the slightly shorter potential flowering range of Purple OG #18 (8–9 weeks) could let you fit in an additional cycle over time compared to strains with consistently longer flowering periods. However, in a single grow, you can generally expect comparable yield potential from both, assuming identical conditions.
Effects Comparison
Both strains are classified as strong in THC, and both are hybrids. The available data does not specify detailed effects or detailed cannabinoid profiles, so we cannot draw fine-grained distinctions about how each one feels beyond their shared reputation for strong potency.
That said, their genetic backgrounds provide some general guidance:
- Purple OG #18 mixes The OG #18 with Purple Wreck, so its effects profile may reflect an interplay between OG traits and Purple lineage. This could appeal to those interested in a hybrid experience that is not exclusively OG-driven.
- The OG #18, as an OG Kush S1 pheno, is aimed at people who want a more classic OG-style hybrid, with strong THC and a clear OG genetic base.
For users looking specifically for powerful effects and a recognizable OG character, The OG #18 may be the more direct choice. For those curious about a strong hybrid that includes both OG and Purple genetics, Purple OG #18 offers a slightly different angle while still providing strong THC levels.
6. Which Should You Choose?
Your choice between Purple OG #18 and The OG #18 depends on your priorities as a grower and consumer:
- If you are a first-time grower: Both are feminized and suitable for beginners who can follow standard growing guidelines. Purple OG #18 is marginally more attractive if you want a potentially shorter flowering period (8–9 weeks) to reach your first harvest a bit sooner.
- If you want strong effects: Both strains are described as strong in THC, so either will meet the need for potency. If you prefer a more classic OG Kush-based hybrid profile, The OG #18, with its OG Kush S1 pheno genetics, is a straightforward pick.
- If you are focused on high yield: Both are rated as having good yields, so there is no clear yield winner in the data provided. In practice, your growing environment and techniques will likely influence yield more than the small genetic differences between these two.
- If you want variety in genetics: Choose Purple OG #18 if you like the idea of OG genetics combined with Purple Wreck in one hybrid, offering a different take on the OG line.
- If you value a classic OG lineage: Choose The OG #18. Its OG Kush S1 pheno background makes it a more direct expression of OG genetics for those who prioritise that heritage.
7. Final Thoughts
Purple OG #18 and The OG #18 share many strengths: both are feminized hybrids from Reserva Privada with good yields and strong THC levels. The real differences come down to genetics and a slightly shorter potential flowering time for Purple OG #18.
If you want a quick-finishing, OG-meets-Purple hybrid that suits newer growers and still offers strong potency, Purple OG #18 is a sensible option. If your priority is an OG Kush S1 pheno with a classic OG identity and equally strong THC, The OG #18 is the more direct route. Either way, both strains provide a solid foundation for growers and buyers who want reliable feminized seeds and powerful hybrid results.
