Arjans Haze #2 vs Arjan's Ultra Haze: Which Feminized Sativa Fits You Best?

1. Introduction

Both Arjans Haze #2 and Arjan's Ultra Haze come from Greenhouse Seed Co and are feminized, sativa-dominant strains. They appeal to growers who enjoy classic Haze-style genetics and are looking for strong, uplifting effects rather than short, fast indica plants.

If you're a first-time grower, a buyer comparing strains before purchase, or a grower focused on high yield and strong effects, looking at these two side by side helps clarify which one is likely to suit your goals, timeline, and experience level.

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	Neville's Haze × Cambodian × Lao
Type	Sativa	Sativa
Flowering Time	10 weeks	12 weeks
THC	Not specified	Strong
Yield	Not specified	Not specified

3. Arjans Haze #2 Overview

Arjans Haze #2 is a feminized sativa created by Greenhouse Seed Co from a blend of Haze and Lao genetics. It is designed to express the soaring, cerebral side of sativas while keeping the flowering window relatively contained for this type of plant.

With a flowering time of about 10 weeks, it is on the quicker side for a Haze-based sativa. This shorter cycle can make it easier to integrate into an indoor schedule or shorter outdoor seasons, especially compared with longer-running Haze hybrids. For new growers, a moderate flowering duration often means fewer weeks of managing plant height and fewer opportunities for mistakes late in bloom.

No specific yield or THC figures are provided for Arjans Haze #2, so expectations should be set in general terms: as a sativa, it typically prioritises an energetic and uplifting character over compact size. Its Haze and Lao heritage suggests a more classic, long-limbed structure, so growers may want to plan for sufficient vertical space and consider training techniques if cultivating indoors.

Because there is no detailed effects profile in the data, it is best to think of Arjans Haze #2 as aimed at those who enjoy traditional sativa experiences rather than heavy, sedating outcomes. The combination of Haze and Lao is often chosen by people who value clear-headed, long-lasting effects, but specific nuances are not defined here.

4. Arjan's Ultra Haze Overview

Arjan's Ultra Haze is another feminized sativa from Greenhouse Seed Co, built from a more complex background: Neville's Haze crossed with Cambodian and Lao. This multi-way cross leans strongly into the “classic sativa” profile, with a clear emphasis on potency and extended flowering.

The 12-week flowering time immediately sets Arjan's Ultra Haze apart. This longer bloom phase usually requires more patience, a more stable environment, and consistent care over a greater period. For indoor growers, that can mean more electricity use and more time managing plant height and nutrition. Outdoor growers in shorter-summer regions must consider whether their season comfortably covers a 12-week flowering phase.

Unlike Arjans Haze #2, Arjan's Ultra Haze is explicitly described as having strong THC levels. While no exact percentage is given, the “strong” note indicates it is intended for users seeking pronounced, powerful effects rather than something subtle. That makes it a candidate for experienced consumers or those specifically interested in intense sativa potency.

Because no yield figure is specified, it is not possible to claim whether it is a low or high producer. However, long-flowering sativas like this are often chosen by growers willing to trade a longer timeline for complex, strong effects. If your priority is effect intensity, this strain’s combination of Neville's Haze, Cambodian, and Lao genetics is a key point of interest.

5. Key Differences

General Comparison

Both strains are feminized sativas from the same breeder, but their construction and growth cycles differ:

• Genetic makeup: Arjans Haze #2 combines Haze and Lao, while Arjan's Ultra Haze adds Neville's Haze and Cambodian into the mix alongside Lao. This makes Ultra Haze genetically more complex and strongly skewed towards classic, racy sativa heritage.
• Flowering time: Arjans Haze #2 finishes in around 10 weeks, compared to 12 weeks for Arjan's Ultra Haze. Those extra two weeks represent a significant difference in planning, costs, and risk exposure over the grow.
• Potency indication: Arjan's Ultra Haze is marked as having strong THC. Arjans Haze #2 has no specific THC information in the provided data, so it is not labelled in the same way for intensity.

Which Is Better for Beginners?

For first-time growers and beginners looking for easier cultivation, Arjans Haze #2 generally fits better based on the available data:

• Shorter flowering time (10 weeks): New growers benefit from a quicker turnaround. A 10-week sativa bloom is more manageable than 12 weeks, reducing the time you need to maintain ideal conditions.
• Lower risk over time: Fewer weeks in flower means fewer chances for issues such as nutrient imbalances, pests, or late-stage problems to develop.
• Potency considerations: For people new to strong sativas, starting with a strain that is not explicitly labeled as “strong THC” may feel more approachable. Since Arjans Haze #2’s potency is not specified, it avoids pre-committing you to very intense effects.

Arjan's Ultra Haze, with its longer 12-week flowering period and strong THC note, is generally better suited to growers with some experience managing tall sativas, or to beginners who are very confident and prepared for a more demanding schedule.

Yield Comparison

Neither product includes concrete yield data, so a direct “which yields more” answer isn’t possible from the information available. However, you can still weigh them from a grow-planning perspective:

• Time vs. output: A 12-week plant like Arjan's Ultra Haze keeps your grow space occupied longer. To be worthwhile, many growers expect such strains to justify the extra time through their effects or, in some setups, through yield. But there is no explicit yield claim here.
• Turnover speed: Arjans Haze #2 may allow more harvest cycles over the same period, especially indoors. Even if individual yields are similar, running a slightly quicker strain can increase your yearly output.
• Risk management: The longer a crop runs, the more chances for setbacks that can affect overall yield, such as late-season weather outdoors or equipment failure indoors.

If your main concern is maximizing the number of harvests and keeping plants moving through your space, Arjans Haze #2 has a practical advantage thanks to its shorter flowering time. If you are prepared to dedicate more weeks and are primarily chasing strong potency, you may decide that Arjan's Ultra Haze is a better use of your room, even without explicit yield figures.

Effects Comparison

The data for Arjans Haze #2 does not include a detailed effects description or THC rating, while Arjan's Ultra Haze is clearly described as strong in THC. Based on this:

• Arjan's Ultra Haze: Highlighted as strong THC, it targets users who want pronounced, intense sativa effects. This is often appealing to experienced consumers or those specifically seeking powerful, long-lasting impact.
• Arjans Haze #2: With no THC value or effect notes, it stands as a more general sativa option. It will still reflect its Haze and Lao genes, but the lack of a “strong THC” label suggests it is not specifically marketed on extreme intensity in the same way.

For users who know they want a heavy-hitting sativa, Arjan's Ultra Haze is the clearer choice based on the available information. For those who prefer not to commit upfront to very strong THC, or who are newer to sativas, Arjans Haze #2 may feel like a safer starting point.

6. Which Should You Choose?

Different types of growers and buyers will naturally gravitate toward one or the other:

• First-time grower / beginner looking for easy cultivation:
  Arjans Haze #2 is generally the better fit. Its 10-week flowering time is easier to manage, reduces the duration of potential mistakes, and makes planning simpler. It lets you experience a Haze-style sativa without committing to a very long cycle.
• User looking for strong effects:
  Arjan's Ultra Haze stands out thanks to the “strong” THC description. If your priority is potency and you are comfortable with intense sativa effects, this strain is likely more aligned with your expectations.
• Grower focused on high yield:
  With no yield data, you have to think in broader terms. If you measure yield per year or per unit of time, Arjans Haze #2 may edge ahead because you can complete cycles more quickly. If your idea of “yield” is more about effect per plant and you are willing to invest more weeks, Arjan's Ultra Haze could be considered a more specialised choice aimed at quality and intensity.
• Buyer comparing strains before purchase:
  Choose Arjans Haze #2 if you value practicality, a more manageable flowering duration, and a slightly simpler introduction to sativa growing. Choose Arjan's Ultra Haze if you want a longer, more demanding run in exchange for strong THC and a genetic profile built around classic, potent Hazes.

7. Final Thoughts

Arjans Haze #2 and Arjan's Ultra Haze share a Haze-driven, sativa focus and the reliability of feminized seeds from the same breeder, but they serve slightly different needs. The first leans toward accessibility and a more manageable timeframe, while the second pushes further into long-flowering, strong-THC territory.

If you are new to growing or want a more straightforward first sativa, Arjans Haze #2 is usually the more practical choice. If you have the patience for a 12-week bloom and are specifically chasing pronounced, strong effects, Arjan's Ultra Haze is likely to match your priorities more closely.