Arjan’s Ultra Haze

Green House Seed Co. lists Arjan’s Ultra Haze as an 80% sativa strain combining Neville’s Haze with Cambodian and Laos genetics. It belongs to an older school of marijuana breeding in which long flowering periods, dramatic vertical growth, unusual aromatics, and slowly developing cerebral effects mattered more than producing compact plants with eight-week harvest schedules. The breeder describes it as a creeping, introspective sativa and credits the cultivar with first place at the 2006 High Times Cannabis Cup. Its profile is correspondingly distinctive: sharp citrus and herbs lead into mint, spice, and an almost metallic Haze character rather than the sugary candy flavors common in modern cannabis.

Genetics and Lineage

The pedigree is unusually clear because the original breeder still documents it directly. Arjan’s Ultra Haze was produced from Neville’s Haze crossed with Cambodian and Laos cannabis genetics. Green House Seed Co. says the variety was created by Arjan during an earlier period of his breeding career, and the resulting plant retains many characteristics associated with tropical and old-school Haze marijuana: height, long lateral branches, narrow-leaf morphology, elongated flowers, and a flowering cycle that extends well beyond that of most contemporary hybrids.

Neville’s Haze supplies much of the unmistakable Haze personality. Rather than creating a dense, squat weed plant, its influence encourages considerable stretch and a strong cerebral character. Cambodian and Laos ancestry adds another layer of Southeast Asian sativa expression, helping explain the cultivar’s extended maturation and fresh, spicy aromatic range. The breeder describes mature flowers as long and somewhat spiral-shaped along the supporting branches, with relatively open density and prominent pistils. That structure is markedly different from the rounded, rock-hard buds produced by many indica-influenced commercial varieties.

Effects and Experience

Arjan’s Ultra Haze does not necessarily reveal its full strength immediately. Green House Seed Co. specifically characterizes the effect as a “creeper,” meaning the psychoactive intensity may continue building after consumption rather than peaking at once. The breeder associates the experience with introspection and meditation, an apt description for a marijuana variety whose effects are more cerebral than physically heavy.

Early in the experience, the weed may feel mentally bright, perceptive, and spacious. As the high develops, thoughts can become more immersive and internally focused. This progression distinguishes it from energetic sativas that simply produce rapid stimulation. At roughly 21% THC in breeder testing and with very little CBD, however, it should not automatically be interpreted as gentle. Psychoactive responses vary according to dose, tolerance, individual physiology, and consumption method, and slowly emerging effects can make overconsumption easier for inexperienced consumers.

Medical Benefits

There are no robust clinical trials demonstrating that Arjan’s Ultra Haze itself treats a particular medical condition, so medical claims about the cultivar should be separated from the broader evidence concerning cannabis and cannabinoids. Its THC-dominant chemistry may make it relevant to medical marijuana patients seeking effects associated with THC-containing cannabis, but strain names and terpene descriptions are not substitutes for standardized clinical data.

Research on cannabis and cannabinoids more broadly has found evidence of modest benefit for certain forms of chronic pain, while cannabinoid medicines have established roles in treating chemotherapy-associated nausea and vomiting. Evidence surrounding sleep is more complicated: some studies involving patients with other health conditions have found improvements in sleep measures, but it remains uncertain how much of that effect comes from direct changes in sleep versus relief of underlying symptoms.

Because this cultivar is strongly THC-dominant and very low in CBD, patients sensitive to psychoactive cannabis may find its mental intensity undesirable. THC can produce dizziness, anxiety, altered attention, impaired coordination, or an uncomfortable increase in subjective intoxication in some individuals. Anyone considering marijuana for a medical problem should view the strain as a cannabis product with a particular chemical and sensory profile, not as a proven treatment for a specific disease.

Flavor Profile and Aroma

A jar of well-cured Arjan’s Ultra Haze sits far outside the modern dessert-strain spectrum. Green House Seed Co. describes its fragrance as fresh, citric, and herbal, with Neville’s Haze contributing spicy and metallic qualities while the Cambodian and Laos side introduces mint and additional citrus character. The combination can move from lemon peel and crushed greenery toward peppery herbs, cool mint, and the distinctive incense-like sharpness associated with traditional Haze cannabis.

Among the most expressed aromatic compounds identified by the breeder are α-pinene, β-caryophyllene, and geranyl acetate. Pinene can contribute piney, fresh herbal notes, while caryophyllene commonly brings pepper and dry spice. Geranyl acetate is associated with sweeter floral, fruity, and citrus-like aromas. Together they help explain why this cultivar can smell simultaneously green, bright, spicy, and exotic rather than fitting neatly into a single flavor category.

Growing Information

Patience is the central requirement when growing Arjan’s Ultra Haze. Green House Seed Co. currently lists an indoor flowering period of approximately 11–12 weeks and potential production around 700 grams per square meter. Plants grow tall and develop long branches, and the breeder specifically identifies the cultivar as suitable for low-stress training. Its vigorous stretch means indoor gardeners need to anticipate final plant height before flowering is well underway rather than trying to correct an overcrowded canopy late in bloom.

Outdoors, the genetics are better suited to environments capable of supporting a long season. The breeder recommends equatorial, tropical, subtropical, and temperate climates and places Northern Hemisphere maturity around early November, with potential yields reaching roughly 1,150 grams from an individual plant under favorable conditions. The long branches and comparatively open flowers reflect the cultivar’s tropical sativa ancestry.

For that reason, this is better regarded as an advanced grow than a beginner variety. Space management, an extended flowering schedule, plant support, and environmental stability all become more important when cannabis remains in bloom for nearly three months. Growers prepared for those demands, however, gain access to a style of Haze plant increasingly different from the short-cycle, densely structured marijuana hybrids dominating much of today’s market.

FAQ

Is Arjan’s Ultra Haze an indica or sativa?

It is a strongly sativa-dominant hybrid. Green House Seed Co. lists Arjan’s Ultra Haze #1 at approximately 80% sativa and 20% indica. Its considerable height, elongated branches, extended bloom period, and cerebral effects all reflect that sativa-heavy background.

What are the genetics of Arjan’s Ultra Haze?

The breeder identifies the genetics as Neville’s Haze × Cambodian × Laos. Arjan’s Ultra Haze 2 is a different cultivar containing Neville’s Haze, Mango Haze, and Laos genetics, so the two should not be treated as interchangeable.

How strong is Arjan’s Ultra Haze?

Green House Seed Co. publishes a THC figure of 21.22% and CBD of 0.19% for Ultra Haze #1. Actual flower potency can vary with phenotype, cultivation, harvest timing, storage, and testing methodology.

How long does Arjan’s Ultra Haze take to flower?

Indoor flowering generally takes about 11–12 weeks according to the breeder. Outdoors, Northern Hemisphere plants mature around early November, making the cultivar considerably slower than many mainstream weed hybrids.

What does Arjan’s Ultra Haze taste like?

Expect a distinctly old-school Haze profile built around citrus, fresh herbs, mint, spice, and metallic undertones. α-Pinene, β-caryophyllene, and geranyl acetate are among the prominent aromatic compounds identified by Green House Seed Co.

Final Thoughts on Arjan’s Ultra Haze

Arjan’s Ultra Haze occupies a different corner of cannabis breeding than today’s compact, fast-flowering dessert strains. Its Neville’s Haze, Cambodian, and Laos ancestry produces a tall, slow-maturing plant with open, elongated flowers and an aromatic profile driven by citrus, herbs, spice, mint, and classic metallic Haze notes. The effect follows the same unconventional pattern: rather than announcing itself immediately, the high may unfold gradually into a strong cerebral and introspective state.

That combination gives this cannabis strain considerable historical and horticultural character. It asks more from the grower, requires more patience than an eight- or nine-week hybrid, and offers little CBD to soften its THC-dominant chemistry. Yet those characteristics are precisely what preserve its identity. For enthusiasts interested in older Haze breeding, tropical sativa influence, and marijuana that tastes and grows distinctly different from modern commercial weed, Arjan’s Ultra Haze remains an unusually recognizable piece of Green House Seed Co. history.