Arjans Haze #2 vs Arjan's Ultra Haze: Which Feminized Sativa Is Right for You?

1. Introduction

If you are choosing between Arjans Haze #2 and Arjan's Ultra Haze, you are already looking in a very specific direction: long-flowering, sativa-dominant genetics from Greenhouse Seed Co. Both are feminized seeds, both come from complex Haze lines, and both are aimed at growers who want pronounced, long-lasting effects rather than quick, compact harvests.

This comparison focuses on what matters most for first-time growers and buyers comparing strains: how the two strains differ in general character, which one is more suitable for beginners, how they compare on flowering time (and what that implies for yield potential), and how their effects may differ based on the available data.

2. Quick Comparison Table

Feature	Arjans Haze #2	Arjan's Ultra Haze
Breeder	Greenhouse Seed Co	Greenhouse Seed Co
Seed Type	Feminized	Feminized
Genetics	Haze and Lao s	Neville's Haze × Cambodian × Lao genetics
Type	Sativa	Sativa
Flowering Time	10 weeks	12 weeks
THC Description	Not specified	Strong

3. Arjans Haze #2 Overview

Arjans Haze #2 is a feminized sativa from Greenhouse Seed Co, built from a blend of Haze and Lao genetics. As a sativa, it is aimed at growers and consumers who appreciate an uplifting, energetic profile rather than the heavier feel often associated with many indicas.

The key practical detail for cultivation is its flowering time of around 10 weeks. For a Haze-based sativa, this is relatively moderate: it still requires patience compared with short-flowering strains, but it is noticeably quicker than many long-running sativa hybrids. This shorter schedule can be especially appealing for newer growers who want to try a Haze without committing to an extended cycle.

Because specific yield figures and effect descriptions are not provided, Arjans Haze #2 is best evaluated on what we do know: its Haze × Lao background, feminized seed format, and 10-week finishing time. The combination suggests a classic sativa leaning toward a clear, active experience, but without official effect data you should treat it as a versatile, generally uplifting Haze option rather than a highly specialized strain.

For first-time growers, the main advantages are:

• A defined, 10-week flowering period that is shorter than many comparable Hazes.
• Feminized seeds, which simplify the process by reducing the need to identify male plants.
• Purely sativa genetics for those specifically seeking that type of effect.

4. Arjan's Ultra Haze Overview

Arjan's Ultra Haze, also from Greenhouse Seed Co, is another feminized sativa but built from more layered parentage: Neville's Haze crossed with Cambodian and Lao genetics. This suggests a deeper, more complex Haze line, combining several classic tropical influences.

The most striking cultivation detail is its longer flowering time of about 12 weeks. This places it among the more patient-demanding sativa strains, more suited to growers who are comfortable with extended flowering and have the ability to keep plants healthy and well-managed over a longer period.

Unlike Arjans Haze #2, Arjan's Ultra Haze has a clear note in the data: its THC is described as “strong”. While no exact percentage is given, this indicates that the breeder expects pronounced potency. For users specifically seeking strong effects, this is a key point in its favour, especially if you prioritise intensity over speed of harvest.

In summary, Arjan's Ultra Haze stands out for:

• Complex Haze lineage (Neville's Haze with Cambodian and Lao influences).
• A longer flowering time of around 12 weeks.
• THC described as strong, indicating powerful effects.

5. Key Differences

General Comparison

Both strains are feminized sativas from the same breeder, but they occupy slightly different positions in the Haze spectrum. Arjans Haze #2 relies on a simpler Haze × Lao combination with a tighter 10-week flowering window, making it feel more “streamlined”. Arjan's Ultra Haze, with Neville's Haze, Cambodian, and Lao genetics, is more of a connoisseur-style sativa, extending flowering to 12 weeks and emphasizing strong THC.

If you view them as part of a range, Arjans Haze #2 is the more accessible, time-efficient option, while Arjan's Ultra Haze aims at growers who are willing to trade time and possibly ease of cultivation for stronger effects and more intricate genetics.

Which Is Better for Beginners?

Based on the available information, Arjans Haze #2 is generally the more beginner-friendly choice:

• Shorter flowering time: 10 weeks versus 12 weeks reduces the risk window for mistakes and stress on plants.
• Straighter genetic profile: A Haze × Lao cross is often easier to manage conceptually than a multi-way cross with Neville's Haze and Cambodian lines.
• Simpler planning: A quicker finish works better for growers with limited space, shorter seasons, or those new to long-flowering sativas.

Arjan's Ultra Haze, by contrast, is better suited to growers who already have some experience with plant training, nutrient management, and maintaining a stable environment over a 12-week flowering window. The strong THC note also means it may be more intense for users who are not yet familiar with potent sativas.

Yield Comparison

There are no explicit yield figures provided for either strain, so direct gram-per-plant or gram-per-square-metre comparisons are not possible. However, flowering time can give some general guidance:

• Arjans Haze #2 (10 weeks): A moderately long cycle that allows decent development while still being manageable. Many growers interpret this timeframe as a good balance between quantity and turnaround.
• Arjan's Ultra Haze (12 weeks): The extra two weeks typically allow sativa strains to add mass and density, which can improve potential yield if the grower maintains ideal conditions.

In practice, this means:

• Growers focused on faster, more frequent harvests may lean toward Arjans Haze #2.
• Growers willing to invest more time, with the space and patience for a 12-week cycle, may find Arjan's Ultra Haze better aligned with a “fewer but potentially heavier” harvest strategy.

Remember that actual yield will depend heavily on your setup, training techniques, and environmental control. With no hard data, it is safer to base your decision on time commitment rather than assumed yield numbers.

Effects Comparison

Specific, detailed effect descriptions (such as mood, body feel, or flavour nuances) are not provided for either strain, so any comparison must stay within the confirmed data.

For Arjans Haze #2, the lack of THC information and effect notes means it should be considered a typical sativa option built from Haze and Lao genetics, likely geared toward an uplifting, daytime style experience, but without an official potency statement.

Arjan's Ultra Haze, however, is explicitly described as having “strong” THC. This suggests:

• More intense, pronounced effects compared with an average sativa.
• Particular appeal for users already comfortable with potent strains, or those actively seeking a more powerful experience.

If you are sensitive to strong effects or are still discovering your tolerance, Arjans Haze #2 may feel like a safer starting point. If you are specifically looking for something with clearly strong THC and are prepared for a more powerful impact, Arjan's Ultra Haze stands out in this respect.

6. Which Should You Choose?

Here is how to match each strain to typical priorities:

• First-time grower or beginner looking for easy cultivation:
  Arjans Haze #2 is the better fit. The 10-week flowering time is more manageable, and the simpler genetic makeup can make the learning curve less steep. It allows you to explore Haze-style sativas without committing to the longest cycles.
• User looking for strong effects:
  Arjan's Ultra Haze is the more appropriate choice. The “strong” THC designation signals clearly potent effects, which will appeal to experienced users and those specifically chasing intensity.
• Grower focused on high yield with patience for long cycles:
  While exact yields are not listed, the 12-week flowering time of Arjan's Ultra Haze gives it more time to develop, which many growers associate with stronger yield potential if the environment is well controlled. If time is less of a concern than maximising development, this strain is likely the better match.
• Buyer comparing overall practicality and turnaround:
  Arjans Haze #2 offers a more practical balance of sativa character and cycle length. It works well for those who want to enjoy sativa traits but also value efficiency and shorter planning windows.

7. Final Thoughts

Choosing between Arjans Haze #2 and Arjan's Ultra Haze ultimately comes down to how you balance time, experience, and desired intensity. Arjans Haze #2 suits growers and users who want a classic sativa experience with a more manageable 10-week flowering period. Arjan's Ultra Haze is geared toward those who don’t mind a 12-week cycle and who specifically want strong THC and richer, multi-layered Haze genetics.

If you are new to growing or prefer a slightly easier path, Arjans Haze #2 is the more forgiving option. If you have some experience and your top priority is powerful effects from a long-flowering sativa, Arjan's Ultra Haze is likely to align better with your goals.