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

1. Introduction

If you’re comparing Arjan's Ultra Haze 2 and Arjans Haze #2, you’re already looking in a specific direction: long-flowering sativa seeds from Greenhouse Seed Co with strong, energising potential. Both are feminized, so they’re designed to produce female plants, but they differ in genetics and flowering time, which has a real impact on how suitable they are for first-time growers, yield-focused cultivators, and those chasing strong effects.

Below, you’ll find a side-by-side comparison focused on general differences, beginner-friendliness, yield considerations, and what to expect in terms of potency and effects, based only on the product information available.

2. Quick Comparison Table

Feature	Arjan's Ultra Haze 2	Arjans Haze #2
Breeder	Greenhouse Seed Co	Greenhouse Seed Co
Seed type	Feminized	Feminized
Type	Sativa	Sativa
Genetics	Neville's Haze × Mango Haze × Laos genetics	Haze × Laos
Flowering time	12 weeks	10 weeks
THC / potency info	Strong	Not specified
Yield	Not specified	Not specified

3. Arjan's Ultra Haze 2 Overview

Arjan's Ultra Haze 2 is a feminized sativa from Greenhouse Seed Co, created by combining Neville's Haze, Mango Haze and Laos genetics. This blend brings together classic Haze lines with Southeast Asian influence, making it a more complex hybrid in terms of background compared with Arjans Haze #2.

The flowering time is listed at around 12 weeks. For growers, especially those working indoors, this means a relatively long cycle from the switch to flowering until the plants are ready to harvest. Planning for that extra time is important if you are limited by space, electricity costs, or seasonal weather.

THC is described as “strong,” which suggests that Arjan's Ultra Haze 2 is aimed at users looking for pronounced, powerful effects rather than mild or moderate impact. While specific effects or flavour notes are not provided in the product data, the combination of Haze and Laos genetics and the strong THC indication points toward a classic, potent sativa experience rather than a subtle one.

Because it is feminized, you should not need to identify and remove male plants in a typical grow, which simplifies cultivation. However, the long flowering time and strong sativa profile mean it may still require some patience and basic growing skills to manage height, feeding, and timing of the grow.

4. Arjans Haze #2 Overview

Arjans Haze #2 is also a feminized sativa from Greenhouse Seed Co, but with a more straightforward pedigree: a cross of Haze and Laos. Compared with Arjan's Ultra Haze 2, this strain has slightly simpler stated genetics, without the added Mango Haze component.

The key structural difference is its flowering time of about 10 weeks. This is still long compared with many indica or hybrid strains, but notably shorter than the 12 weeks listed for Arjan's Ultra Haze 2. For growers, especially beginners or those on tighter schedules, trimming two weeks off the flowering period can make a meaningful difference in how feasible the grow feels.

There is no specific THC information provided for Arjans Haze #2 in the available data, other than it being a sativa Haze-type strain. Without explicit potency figures or descriptors, it’s safer to treat it as a typical Haze-based sativa rather than assume it is either milder or stronger than Arjan's Ultra Haze 2.

As with Arjan's Ultra Haze 2, feminized seeds reduce the need to identify male plants, which simplifies cultivation. The slightly shorter flowering time, combined with its sativa background, may make Arjans Haze #2 a more manageable introduction to longer-flowering strains for some first-time growers.

5. Key Differences

General comparison

Both strains come from the same breeder (Greenhouse Seed Co), are feminized, and are classified as sativas, but they differ in complexity of genetics and expected growing timeline:

• Arjan's Ultra Haze 2 combines Neville's Haze, Mango Haze and Laos genetics, suggesting a more layered Haze heritage.
• Arjans Haze #2 is described as a cross of Haze and Laos, which is a bit simpler on paper.
• The flowering time is longer for Arjan's Ultra Haze 2 (12 weeks) and shorter for Arjans Haze #2 (10 weeks).
• Only Arjan's Ultra Haze 2 has an explicit “strong” THC description in the data provided.

In practice, this means Arjan's Ultra Haze 2 is positioned as the more potent, more time-intensive option, while Arjans Haze #2 leans toward a slightly quicker route to harvest with a similar sativa character.

Which is better for beginners?

Both strains are sativa-dominant with fairly long flowering periods, which can be more demanding for someone who has never grown before. However, certain aspects make one marginally more beginner-friendly:

• Arjans Haze #2 has the edge for first-time growers thanks to its shorter 10-week flowering time. Less time in bloom means a lower chance of running into late-flower issues and an earlier reward for your efforts.
• Arjan's Ultra Haze 2 might be more challenging purely due to the 12-week flowering period and the “strong” THC indication, which can require careful drying, curing, and dosing for users not used to powerful sativas.

If you’re a complete beginner and want to experience a Haze-style grow without committing to the longest possible flowering cycle, Arjans Haze #2 is generally the more approachable starting point out of the two, based on the available data.

Yield comparison

Neither product listing provides explicit yield figures. That means you can’t reliably choose between them based on grams per square metre or per plant from the data given.

However, you can still think about yield in terms of time investment:

• Arjan's Ultra Haze 2, with its 12-week flowering period, ties up your space for longer. Even if the per-harvest yield were similar, you would fit fewer full cycles into the same calendar year.
• Arjans Haze #2, at 10 weeks of flowering, allows for a slightly quicker turnaround. This can effectively increase your annual output if you run multiple grows, even if individual harvest weights are comparable.

Because actual yield numbers are not specified, if your main concern is maximising harvest weight, your choice may come down more to your schedule and how many cycles per year you can realistically manage, rather than clear per-plant yield differences between these two.

Effects comparison

Detailed effect descriptions are not provided for either strain in the data, so any comparison has to stay general and avoid assumptions.

• Arjan's Ultra Haze 2 is explicitly described as having “strong” THC. This suggests that its effects are likely intended for users who prefer noticeable potency, which often aligns with stimulating or intense sativa experiences.
• Arjans Haze #2 has no potency notes in the product data beyond being a Haze/Laos-based sativa. Without explicit THC information, it is not possible to say whether it is stronger or milder than Arjan's Ultra Haze 2.

If you are specifically looking for strong effects and want that clearly indicated on the product page, Arjan's Ultra Haze 2 is the only one of the two with a direct “strong THC” reference in the data. If you prefer to avoid committing to the explicitly stronger option, Arjans Haze #2 may feel like a more cautious pick, though exact potency levels are not stated.

6. Which Should You Choose?

Your decision between Arjan's Ultra Haze 2 and Arjans Haze #2 should be based on your priorities as a grower and user. Here are some scenario-based guidelines drawn from the available information:

• First-time grower wanting an easier introduction:
  Arjans Haze #2 is generally more suitable thanks to its shorter 10-week flowering time. You’ll spend less time managing plants in bloom and reach harvest sooner, which can be encouraging on your first run.
• User looking for strong effects:
  Arjan's Ultra Haze 2 is the more clearly positioned option for pronounced potency, as it’s the only one described as having “strong” THC. If your main goal is a powerful sativa experience and you’re comfortable with that, this strain aligns better with that preference.
• Beginner looking for easy cultivation but still curious about Haze:
  While neither strain is “short and fast” in the sense of an indica-dominant hybrid, Arjans Haze #2 offers a more forgiving timeline for learning the basics of plant care, training, and flowering.
• Grower focused on total yearly yield:
  With no direct yield figures, consider your schedule instead. If you want to fit more cycles into a year, the 10-week flowering of Arjans Haze #2 could support slightly more frequent harvests. If you’re comfortable dedicating more time to each run and prioritise the explicitly strong THC profile, Arjan's Ultra Haze 2 may still be attractive, even though it locks your space for longer per grow.
• Grower or buyer comparing sativa character and heritage:
  Choose Arjan's Ultra Haze 2 if you’re drawn to more complex genetics mixing Neville’s Haze, Mango Haze and Laos. Pick Arjans Haze #2 if you prefer the more straightforward Haze × Laos background and a slightly quicker finish.

7. Final Thoughts

Both Arjan's Ultra Haze 2 and Arjans Haze #2 are feminized sativas from the same breeder, but they serve slightly different needs. Arjan's Ultra Haze 2 stands out for its explicitly strong THC and more complex mix of Haze genetics, at the cost of a longer 12-week flowering period. Arjans Haze #2 keeps the Haze/Laos profile but trims flowering down to 10 weeks, making it more approachable for first-time growers or those aiming for quicker harvests.

If you prioritise clearly labelled strong effects and don’t mind waiting longer, Arjan's Ultra Haze 2 is the natural choice. If you value a shorter grow cycle and a somewhat more beginner-friendly path into sativa cultivation, Arjans Haze #2 is likely the better fit.