Arjans Haze 3 (Greenhouse Seed Co) vs Arjan's Ultra Haze (Greenhouse Seed Co) cannabis seeds comparison

Arjans Haze 3 vs Arjan's Ultra Haze: Which Feminized Haze Is Right for You?

Introduction

When you are choosing between Arjans Haze 3 and Arjan's Ultra Haze, you are really deciding between two different takes on classic Haze genetics from the same breeder, Greenhouse Seed Co. Both are sativa feminized seeds built from Neville’s Haze and Southeast Asian genetics, but they differ in flowering time, THC strength, and how suitable they are for first-time growers versus experienced users looking for intense effects.

This comparison focuses on what matters most to new and intermediate growers: how demanding each strain is in the grow room, how long you will wait for harvest, and what kind of potency you can generally expect.

Quick Comparison Table

Feature	Arjans Haze 3	Arjan's Ultra Haze
Breeder	Greenhouse Seed Co	Greenhouse Seed Co
Seed Type	Feminized	Feminized
Type	Sativa	Sativa
Genetics	Neville’s Haze × Super Silver Haze × Laos	Neville's Haze × Cambodian and Lao genetics
Flowering Time	9 weeks	12 weeks
THC	Average	Strong

Arjans Haze 3 Overview

Arjans Haze 3 is a feminized sativa from Greenhouse Seed Co that combines Neville’s Haze with Super Silver Haze and Laos. This blend keeps the classic Haze character but is designed to finish in a shorter time compared with many long-running sativas.

One of the most practical features of Arjans Haze 3 is its reported 9-week flowering period. For a Haze-dominant sativa, this is relatively quick, which can be appealing for growers who do not want to wait through an extended flowering cycle. A shorter schedule can also make planning easier if you are working within seasonal constraints or limited indoor space.

THC levels are described as “average” rather than extremely high. For many users, that can translate into a more manageable and balanced experience, especially if you are still exploring sativa strains and want to avoid overwhelming potency. While there is no specific yield data provided, the underlying genetics (Neville’s Haze and Super Silver Haze) are widely known for productive plants in general, so Arjans Haze 3 is typically chosen by growers who want a classic Haze profile without committing to the longest flowering times or the most intense strength.

Because it is feminized, you can expect a very high likelihood of female plants, which simplifies cultivation for beginners who may not want to deal with identifying and removing males.

Arjan's Ultra Haze Overview

Arjan's Ultra Haze is another feminized sativa from Greenhouse Seed Co, built from Neville's Haze crossed with Cambodian and Lao genetics. This maintains the same Haze backbone as Arjans Haze 3 but leans into a different Southeast Asian influence, which can appeal to growers who enjoy more exotic sativa lines.

A key characteristic of Arjan's Ultra Haze is its 12-week flowering time. This places it firmly in the category of long-flowering sativas. Such a schedule typically requires more patience, more planning around your grow space, and a willingness to maintain plants for a longer period before harvest.

THC is listed as “strong,” positioning Arjan's Ultra Haze as the more powerful option between the two. This makes it particularly attractive to experienced users looking for potent effects, or growers who specifically want a strain that sits on the stronger end of the spectrum. However, that same strength can be less forgiving for people who prefer milder, more moderate experiences.

Like Arjans Haze 3, it comes as feminized seed, so it is intended to simplify the process of getting female plants. Still, the long flowering time and stronger THC suggest that Arjan's Ultra Haze is typically better suited to growers and consumers who already know they enjoy intense sativa effects and are comfortable dedicating extra time to the flowering phase.

Key Differences

General Comparison

Both strains share a foundation in Neville’s Haze and Southeast Asian genetics, and both are feminized sativas from the same breeder. The main differences are:

Flowering duration: Arjans Haze 3 finishes in about 9 weeks, while Arjan's Ultra Haze needs about 12 weeks.
THC level: Arjans Haze 3 is described as having “average” THC, whereas Arjan's Ultra Haze is categorized as “strong.”
Genetic emphasis: Arjans Haze 3 brings in Super Silver Haze and Laos, while Arjan's Ultra Haze combines Neville’s Haze with Cambodian and Lao genetics.

In practical terms, these differences affect how long you will be caring for the plants, how demanding the grow might feel, and how powerful the eventual effects are likely to be.

Which Is Better for Beginners?

For a first-time grower or someone still gaining confidence, Arjans Haze 3 is generally the more approachable option. The shorter 9-week flowering period means:

You will reach harvest faster, reducing the overall time you are managing the flowering environment.
There is less time for potential issues to develop late in the cycle.

Its “average” THC classification can also be more forgiving for beginners who may not yet know their tolerance or preferred strength. The combination of moderate potency and quicker finishing time makes Arjans Haze 3 the more beginner-friendly choice in most cases.

Arjan's Ultra Haze, by contrast, is better suited to growers who already have some patience and experience. Maintaining a sativa for around 12 weeks in flower is a longer commitment and can feel challenging for someone on their first run. The stronger THC may also be intense for new users who are still getting used to powerful sativas.

Yield Comparison

No explicit yield figures are provided for either Arjans Haze 3 or Arjan's Ultra Haze, so it is not possible to directly compare grams per plant or per square metre. However, there are still some practical points to consider:

Time vs. harvest: A 12-week flowering period, like that of Arjan's Ultra Haze, often allows sativa plants more time to develop and can, in many setups, result in higher total output per plant if everything is managed well. But this is balanced against the extra time, energy, and resources you invest.
Cycle turnover: With Arjans Haze 3 finishing in about 9 weeks, you may be able to fit more full cycles into the same time frame, especially in an indoor setting. Over a year, quicker cycles can rival or even surpass the total yield of longer-flowering strains, depending on your schedule.

If your priority is maximizing yield per year or per unit of time, Arjans Haze 3’s shorter flowering period can be an advantage. If you are more interested in the potential of a long-running sativa and are prepared to dedicate the full 12 weeks, Arjan's Ultra Haze might appeal, though exact yield outcomes will depend heavily on your setup and growing skills.

Effects Comparison

There are no detailed effect descriptions given for either strain, but the THC classifications provide a useful guideline:

Arjans Haze 3 – Average THC: Typically better aligned with users who want a noticeable but not overwhelming sativa experience. It suits those who prefer more moderate potency or who are still discovering what levels of strength they enjoy.
Arjan's Ultra Haze – Strong THC: Positioned toward users looking for intense, powerful effects. This makes it more suitable for experienced consumers who already know they enjoy high-THC sativas and are comfortable with stronger sensations.

For someone specifically seeking “strong effects,” Arjan's Ultra Haze is clearly the more relevant choice on paper. For those who value a more balanced or approachable profile, Arjans Haze 3 stands out.

Which Should You Choose?

Your ideal choice depends on your experience level, patience as a grower, and how strong you like your sativa effects.

You are a first-time grower or want an easier cultivation experience:
Arjans Haze 3 is the more practical option. The 9-week flowering time reduces the overall effort and risk, and the average THC makes it a safer bet if you are still learning your preferences.
You are focused on quick turnaround and efficient cycles:
Again, Arjans Haze 3 has the advantage. Faster finishing means you can potentially run more harvests over the same period.
You are an experienced user looking for strong effects:
Arjan's Ultra Haze, with its strong THC classification, aligns better with this goal. The longer 12-week flowering period is the trade-off for aiming at more intense potency.
You enjoy long, involved sativa grows and do not mind waiting:
If you are comfortable managing a flowering period of around 12 weeks and want to explore a Haze line with Cambodian and Lao influences, Arjan's Ultra Haze is the more distinctive long-running sativa choice.

Final Thoughts

Both Arjans Haze 3 and Arjan's Ultra Haze deliver classic Haze-style feminized sativas from Greenhouse Seed Co, but they target slightly different growers and users. Arjans Haze 3 emphasizes a shorter 9-week flowering time and average THC, making it suitable for beginners and for people who prefer more manageable potency. Arjan's Ultra Haze stretches flowering to 12 weeks and is marked by strong THC, appealing more to experienced growers and those specifically looking for powerful effects.

If you want an accessible introduction to Haze-dominant sativas with a quicker path to harvest, Arjans Haze 3 is likely the better fit. If your priority is intense strength and you do not mind a longer grow, Arjan's Ultra Haze becomes the more compelling choice.