Written by Ad OpsHistory and Breeding Context
Arjan's Haze #2 is a sativa-leaning cultivar bred by the Dutch powerhouse Green House Seeds, a brand famously associated with breeder Arjan Roskam. The Haze series from Green House was developed to capture the electric, cerebral energy of old-world Haze lines while improving indoor feasibility and yield. Arjan's Haze #2 emerged in the mid-2000s era of European seed innovation, when breeders were stacking Haze genetics to combine intensity, bag appeal, and finish times compatible with modern indoor lighting. The result is a refined, high-output sativa with classic haze incense layered over citrus and spice.
Green House Seeds helped set potency and yield benchmarks during a time when average European dispensary flower often tested below 15 percent THC. The company made its name with cup-winning sativas and hybrids, many of which pushed THC into the 18 to 22 percent range in verified lab tests of the period. While exact numbers vary by phenotype and environment, Arjan's Haze #2 was positioned to deliver top-tier potency with a friendlier flowering window than vintage tropical Hazes. That strategy broadened access to an energizing, uplifting effect profile without requiring 14 to 16 weeks of bloom.
The breeding context also reflects Green House Seeds’ emphasis on global landrace inputs. Their catalog frequently integrates Southeast Asian and African sativa traits into Haze frameworks to preserve soaring head effects. Arjan's Haze #2 carries this signature, delivering expansive mental clarity and creative drive that growers and consumers routinely associate with classic haze. The breeder’s objective was to preserve the racy, limonene and terpinolene forward aura while improving structure, resin production, and finish.
In Western Europe’s cool, humid shoulder seasons, old Hazes often struggled with mold and endless ripening. Arjan's Haze #2 addressed this by producing a more predictable 9 to 10 week indoor flowering period under 12 hours of light. That shift is significant because every extra week of flowering increases operational costs by 10 to 12 percent in many small-scale grows. By stabilizing the finish and increasing calyx development, the cultivar achieved both artisan quality and commercial efficiency.
The Haze series from Green House also influenced vaporizer culture, since sativa terpenes volatilize beautifully at moderate temperatures. As the European and North American markets matured, cultivars like Arjan's Haze #2 retained a loyal following among daytime consumers and creative professionals. It is still remembered as an approachable gateway into legacy haze effects with fewer production headaches. That lasting reputation speaks to the skill of combining heritage sativas with modern cultivation priorities.
Genetic Lineage and Sativa Heritage
Green House Seeds lists Arjan's Haze #2 as part of its multi-Haze family, built from pedigrees anchored by Neville’s Haze and Super Silver Haze with Southeast Asian landrace influence. Those inputs are consistent with the aroma and effect profile: incense and cedar from Haze ancestry, bright citrus from limonene-forward lines, and a quick, lucid onset typical of Asian sativas. Growers often describe it as 70 to 80 percent sativa by expression, showing narrow leaves and elongated flower clusters. The cultivar is a photoperiod plant, responding predictably to a 12-12 flower cycle indoors.
Neville’s Haze is famed for its soaring potency and very long flower time, sometimes exceeding 14 weeks under minimal stress. By integrating that backbone with the faster and highly resinous Super Silver Haze line, breeders typically reduce flowering to a 9 to 11 week span while preserving a heady signature. The Southeast Asian landrace inputs contribute peppery, floral, and balsamic notes alongside lean, open bud architecture that breathes well in humid rooms. Together, these traits define Arjan's Haze #2 as a modernized Haze for contemporary grow rooms and discerning palates.
From a genomic standpoint, Haze-derived sativas often carry alleles linked to terpinolene dominance, which is associated with fresh wood, pine, and herbal perfume. That terpene distribution is commonly found in classic haze hybrids and correlates with a mentally stimulating effect profile. The cultivar’s low CBD baseline is also typical for Hazes, which trend toward THC-rich chemotypes with trace minors such as CBG and THCV. Arjan's Haze #2 follows that pattern with minimal CBD and measurable CBG in the 0.3 to 1.0 percent range in many lab reports.
Phenotypically, expect relatively large internodal spacing and a moderate to high stretch at transition. Many growers report a 2.0 to 2.5 times vertical stretch during the first 14 to 21 days of bloom. That growth habit is emblematic of its sativa heritage and informs training strategies like topping, low-stress training, and scrogging. The architecture promotes high light penetration and reduces dense moisture pockets within colas.
The overall lineage places Arjan's Haze #2 squarely in the creative, uplifting camp of classic Amsterdam sativas. It honors the legacy of Haze genetics while reaching for indoor practicality. The Green House Seeds brand association and sativa heritage are directly reflected in how it grows, smells, tastes, and performs. In short, it is a thoughtful synthesis of old-school power and new-school efficiency.
Appearance and Morphology
Arjan's Haze #2 develops tall, elegant plants with narrow leaflets and a pronounced central leader when untrained. The foliage is a vibrant lime to medium green, darkening slightly with cooler night temperatures. In flower, calyxes stack into long, tapering colas with occasional foxtailing near the tips. Pistils range from cream to orange and can amber with extended ripeness.
Trichome coverage is robust for a sativa, presenting a frosted sheen across sugar leaves and bracts. Under magnification, glandular heads are bulbous and plentiful, making the cultivar attractive for dry-sift and ice water hash despite its airy structure. The calyx-to-leaf ratio trends favorable, reducing excessive manicure time compared to leafier tropical Hazes. Expect noticeable resin rails along bract tips by week 7 to 8 of bloom.
Internodal spacing typically lands in the 3 to 6 centimeter range under high-intensity LED or HPS lighting. In lower light, spacing can stretch beyond 7 centimeters, so canopy management is key. Plants often double in height during early flower, and 2.5 times is not uncommon in vigorous phenotypes. Trellising or tomato cages keep the elongated colas upright and evenly exposed to light.
Bud density is moderate, which is advantageous for humidity control and mold resistance. The open architecture allows air to pass through, reducing microclimates that foster botrytis. While the flowers are not rock-hard, they dry evenly and preserve terpenes well with proper handling. The finished appearance balances classic haze spear shapes with a modern, resin-rich presentation.
Color accents can develop in late flower if night temperatures drop 5 to 7 degrees Celsius below daytime highs. Slight anthocyanin expression may appear at leaf margins and sugar tips, adding visual interest without sacrificing vigor. Resin heads mature to a cloudy state around week 9 to 10 under ideal conditions. Those visual cues, paired with trichome sampling, guide harvest timing for optimal effect.
Aroma Profile
The aroma of Arjan's Haze #2 is saturated with incense, citrus zest, and peppered pine. Open a cured jar and the first impression is often sweet wood with a balsamic edge, followed by lemon-lime brightness. As the bouquet unfolds, subtle floral and herbal tones suggest lemongrass and basil. Many users also report a white-wine minerality reminiscent of Sauvignon Blanc.
When ground, the profile intensifies and releases a vapor of cedar, eucalyptus, and fresh zest. The nose-tingling spice indicates beta-caryophyllene and ocimene contributions supporting a terpinolene-dominant core. The overall effect is clean and kinetic rather than heavy or musky. It reads unmistakably as a haze hybrid with a modern polish.
Aromatics stabilize and deepen with a meticulous cure. In the first two weeks, citrus and green herb notes are most prominent. By weeks 4 to 6 of curing, the incense and pine broaden into a rounder bouquet, and delicate sweetness emerges. Proper humidity control around 58 to 62 percent preserves volatilization without flattening the top notes.
Environmental stress can influence expression. Elevated night temperatures tend to push sharper citrus while cooler nights bolster resin and woodier tones. Excess nitrogen late in flower can mute the high notes and introduce a grassy undercurrent. Growers aiming for peak aroma often taper nitrogen by week 6 of bloom and boost potassium to support terpene synthesis.
Total terpene content in well-grown samples often lands between 1.5 and 3.0 percent by weight. That range aligns with broader haze hybrid benchmarks and correlates with a bright, room-filling nose. The cultivar’s aroma projects strongly during trimming and grinding, so odor management is advised indoors. Carbon filtration with rated CFM matched to room volume is an effective control.
Flavor Profile
On inhalation, Arjan's Haze #2 delivers a clean citrus snap overlaid with incense and pine sap. The front palate shows lemon peel and sweet herb, transitioning to cedar and faint anise on the mid-palate. Exhale is dry and spicy with echoes of white pepper and eucalyptus. The finish lingers with a resinous wood note and a touch of grapefruit bitterness.
Vaporization highlights its intricate top notes when set between 175 and 190 degrees Celsius. At these temperatures, terpinolene, pinene, and ocimene volatilize readily, yielding a sparkling, minty-green impression. Raising temperatures above 200 degrees Celsius pulls more beta-caryophyllene and humulene, deepening the spice but sacrificing some brightness. Many users prefer a two-stage session to enjoy both expressions.
Combustion performance is smooth when cured properly. Ash trends light gray to near white, a sign of well-flushed plants and steady drying. If the cure is rushed, grassy or hay-like tones may intrude, masking the incense core. A patient 4 to 8 week cure resolves these edges and optimizes the citrus clarity.
The cultivar pairs well with beverages that accent its herbal-citrus frame. Green tea, sparkling water with lemon, and dry white wine complement the profile without overloading the palate. Savory pairings like rosemary almonds or mild goat cheese align with the pine and spice. The overall impression is crisp and energizing rather than dessert-like.
Flavor stability is above average for a haze, especially after week three of curing. Jar burping protocols help purge chlorophyll-related volatiles while preserving fragile monoterpenes. Using glass jars, 62 percent humidity packs, and cool storage prolongs the top note integrity. When stored correctly, the flavor remains expressive for 4 to 6 months.
Cannabinoid Profile and Potency Metrics
Arjan's Haze #2 is typically THC dominant with low CBD, consistent with Haze-derived sativa chemotypes. Verified test results across haze hybrids place THC commonly in the 18 to 23 percent range under optimized cultivation. CBD is usually below 0.5 percent, with many cuts testing between 0.05 and 0.3 percent. Minor cannabinoids such as CBG can reach 0.3 to 1.0 percent, adding a subtle grounding element.
From a dosing perspective, a 0.1 gram inhalation of 20 percent THC flower delivers approximately 20 milligrams of THC before losses. Combustion and vaporization efficiencies vary, with real-world systemic delivery typically between 20 and 35 percent of inhaled THC. That means an effective absorbed dose around 4 to 7 milligrams for many users per 0.1 gram session. Sensitive consumers should begin with smaller titrations and wait 10 to 15 minutes to assess onset.
Haze-dominant sativas often carry trace THCV, although values are rarely high without explicit THCV breeding. In Arjan's Haze #2, trace THCV may contribute to a clean, focused energy, but lab-quantified THCV typically remains under 0.3 percent. The overall effect is still overwhelmingly driven by THC synergy with terpinolene, pinene, limonene, and caryophyllene. This combination is known for an alert, creative headspace that remains functional when dosed appropriately.
Potency expression is environment-dependent. Optimized lighting at 800 to 1000 micromoles per square meter per second during flower, combined with balanced nutrition and moderate VPD, tends to push THC to the upper end of the range. Stress from overfeeding, heat spikes, or inconsistent irrigation can depress cannabinoid synthesis by 10 to 20 percent. Stable conditions and a disciplined harvest window are key to hitting target potency.
For edible preparations, decarboxylation converts THCA to active THC with typical efficiency near 80 to 90 percent when held around 115 to 120 degrees Celsius for 30 to 45 minutes. Extraction efficiencies vary by method, but simple butter or oil infusions often capture 60 to 70 percent of available cannabinoids. Because the terpene profile leans delicate, infusions benefit from gentle heat and short durations. This preserves the citrus and incense nuances in culinary applications.
Terpene Profile and Aromatic Chemistry
Arjan's Haze #2 commonly expresses terpinolene as a lead terpene, producing the fresh wood, citrus, and herbal bouquet associated with classic Hazes. In well-grown lots, terpinolene can represent 30 to 45 percent of total terpene content. Support comes from beta-myrcene at roughly 10 to 20 percent, beta-caryophyllene between 5 and 8 percent, and alpha-pinene and limonene each around 5 to 10 percent. Ocimene and humulene often appear as secondary contributors in the 2 to 5 percent range.
Total terpene content for haze hybrids typically spans 1.5 to 3.0 percent by weight, with exceptional phenotypes occasionally exceeding 3.5 percent. These levels correlate with the cultivar’s strong nose and persistent flavor. Terpinolene’s volatility means aroma pops quickly but can dissipate if mishandled post-harvest. Slow drying at 60 percent relative humidity and 18 to 20 degrees Celsius preserves monoterpenes effectively.
Chemically, terpinolene is linked to a bright, stimulating sensory profile and is prevalent in sativa-forward cultivars. Alpha-pinene is associated with alertness and has been studied for bronchodilatory potential, which some users perceive as a crisp inhale. Beta-caryophyllene is a CB2 agonist and may add a grounding, body-oriented counterbalance to the heady top end. Limonene contributes to mood elevation and citrus character, rounding out the ensemble.
In synergy terms, the combination of terpinolene, pinene, and limonene often tracks with fast onset and cognitive clarity. That synergy can also amplify potency, making the same THC percentage feel stronger compared to myrcene-heavy indicas. Consumers unaccustomed to terpinolene-dominant profiles should start with conservative servings. The experience is typically uplifting, but dose and context influence comfort.
Growers can nudge terpene expression with targeted strategies. Moderate night drops, potassium and sulfur sufficiency, and avoidance of late-flower nitrogen support terpene biosynthesis. Light intensity in the 700 to 900 micromole range with good spectrum balance helps preserve aromatic fidelity. Excessive heat above 28 to 30 degrees Celsius in late flower can volatilize monoterpenes prematurely and dull the bouquet.
Experiential Effects and Functional Use
Arjan's Haze #2 leans decidedly cerebral, delivering a fast, bright onset within minutes of inhalation. Users commonly report heightened focus, uplifted mood, and a clear motivational push. The headspace tends to be expansive and creative without the heavy introspection of some long-flowering Hazes. At moderate doses, it supports conversation, ideation, and task switching.
Physically, the cultivar is light on sedation and body load, aligning with its sativa heritage. Mild muscle relaxation may arise from beta-caryophyllene and humulene contributions, but couch lock is rare at functional doses. Heart rate can increase slightly for sensitive users, a common response to THC-rich, terpinolene-forward profiles. Hydration and measured pacing help maintain comfort.
Duration of effect typically runs 2 to 3 hours for inhalation, with a pronounced first-hour peak. As the session resolves, a clean comedown replaces the initial spark with calm clarity. Productivity-focused users often microdose across a morning or afternoon to maintain an even arc. In social settings, it balances sociability with mental agility.
Higher doses can push the experience into intensely introspective or racy territory. This is common to haze hybrids and not a defect of the cultivar. To avoid overactivation, new users should begin with single inhalations and wait for full onset before redosing. Experienced consumers usually find an energizing sweet spot without anxiety.
Music, visual art, and outdoor walks pair exceptionally well with the effect profile. Many report amplified sensory detail and pattern recognition, hallmark qualities of haze experiences. For desk work, it favors drafting, brainstorming, and prototyping stages rather than repetitive tasks. The cultivar is a daytime engine when matched with suitable dosage and context.
Potential Medical Uses
While not a substitute for professional medical advice, the profile of Arjan's Haze #2 suggests several potential applications. The uplifting mood and cognitive activation may help with low-motivation states and mild depressive symptoms in some individuals. Limonene and terpinolene are both associated with bright, energizing effects that some patients find supportive during daytime. The cultivar’s low sedation level can be beneficial for those seeking relief without impairment.
Attention and focus challenges can sometimes respond to stimulating sativas in anecdotal reports. The alertness associated with alpha-pinene and the clean headspace of terpinolene-dominant chemotypes may assist task initiation. Users sensitive to racy effects should proceed cautiously, as overstimulation can exacerbate anxiety. Small, measured doses are a prudent starting point.
Mild to moderate pain relief is possible via THC’s analgesic mechanisms and beta-caryophyllene’s CB2 activity. However, for deep neuropathic or inflammatory pain, heavier caryophyllene and myrcene strains often outperform Hazes. Arjan's Haze #2 may still support daytime function by reducing pain interference without heavy sedation. Its anti-fatigue character can be a meaningful secondary benefit.
Appetite stimulation can occur but is generally less pronounced than with indica-leaning cultivars. For patients seeking appetite support without daytime drowsiness, this cultivar can be a viable option. Nausea relief is variable; some users find the bright citrus terpenes soothing, while others prefer gentler profiles. Slow inhalation and moderate temperatures enhance tolerability.
Common side effects include dry mouth, dry eyes, and occasional transient tachycardia in sensitive individuals. Anxiety and restlessness are possible at higher doses due to the energetic terpene ensemble. Patients should avoid overconsumption and consider pairing sessions with calming routines. As with all cannabis use, individual response varies widely and should be monitored closely.
Comprehensive Cultivation Guide
Arjan's Haze #2 behaves like a disciplined modern Haze in the garden, responding well to training and controlled environments. Indoors, plan for a 9 to 10 week flowering period from the onset of 12-12 light. Outdoors in the Northern Hemisphere, harvest windows typically fall from late October to early November at latitudes 35 to 45 degrees. Mediterranean and subtropical climates yield the best outdoor results due to extended, dry autumns.
Germination is straightforward using hydrated cubes or paper towels at 22 to 25 degrees Celsius. Viable, fresh seeds often achieve above 90 percent germination when moisture and oxygen are balanced. Transplant into a light, well-aerated medium such as coco perlite or a quality peat blend once taproots reach 1 to 2 centimeters. Start seedlings under 200 to 300 micromoles per square meter per second to prevent stretch.
Vegetative growth is vigorous and benefits from early structure. Top once at the 5th node, then again after lateral shoots extend 3 to 4 nodes to create 6 to 8 main colas. Low-stress training and a single-layer scrog distribute growth evenly across a 60 by 60 centimeter canopy. Aim for 3 to 5 tops per square foot for balanced light penetration.
Nutrient demands are moderate, with a leaner nitrogen preference than indica-heavy hybrids. In coco or hydro, maintain EC around 1.2 to 1.6 during veg, rising to 1.6 to 1.9 in early flower and tapering to 1.2 to 1.4 in the final two weeks. Soil growers can target runoff EC near 1.2 to 1.5 with organic top-dressing and teas. Keep pH at 5.8 to 6.2 in hydro and 6.3 to 6.8 in soil to optimize nutrient uptake.
Environmental control drives quality. Daytime temperatures of 24 to 28 degrees Celsius and nighttime 18 to 22 degrees are ideal. Maintain VPD around 0.9 to 1.2 kilopascals in mid-flower, easing to 1.2 to 1.4 in late flower to prevent botrytis. Relative humidity should run 60 to 65 percent in veg, 50 to 55 percent in early flower, and 45 to 50 percent in the final weeks.
Lighting intensities of 700 to 900 micromoles per square meter per second across the canopy consistently produce dense resin coverage. Under high-power LEDs, calibrate dimming to prevent foxtailing late in flower; Hazes are predisposed to stretch and heat stress. A 12 hour light schedule for bloom is standard, and some growers use a 11 on, 13 off cycle in the last two weeks to encourage ripening. Keep canopy distance appropriate to your fixtures to avoid photobleaching.
Irrigation should be frequent but measured, especially in coco. Target 10 to 20 percent runoff per fertigation to prevent salt buildup. In soil, allow the top 2 to 3 centimeters to dry before the next watering to maintain oxygen in the root zone. Silica supplements improve stem rigidity for long colas and enhance stress resilience.
Training and canopy management are crucial during stretch. Anticipate a 2.0 to 2.5 times vertical increase in the first three weeks of flower. Tuck growth under a trellis net and use light supercropping to flatten the canopy without damaging vascular tissue. Avoid aggressive defoliation; remove only leaves that block airflow or bury flower sites.
Pest and pathogen strategy should emphasize prevention. The open bud structure reduces botrytis risk, but long flower times still invite issues if humidity spikes. Scout weekly for spider mites and thrips, using yellow and blue sticky cards as sentinels. Introduce beneficials such as Amblyseius swirskii or Phytoseiulus persimilis early if pressure is detected, and maintain strong airflow with 0.5 to 1.0 meter per second across the canopy.
Feeding schedules benefit from phosphorus and potassium emphasis from week 3 of bloom onward. A PK boost in weeks 4 to 6 can enhance calyx expansion, but avoid overapplication that drives nutrient burn and terpene suppression. Calcium and magnesium supplementation at 1 to 2 milliliters per liter is often necessary under LED lighting. Watch for early magnesium deficiency on older leaves and correct promptly.
Harvest timing centers on trichome maturity. For a bright, kinetic effect, cut when trichomes are 5 to 10 percent amber with the majority cloudy. For a slightly deeper finish, 10 to 15 percent amber increases body presence without losing clarity. In either case, a 10 to 14 day fade or flush improves burn quality and flavor.
Drying and curing are pivotal for terpene retention. Hang whole plants or large branches at 18 to 20 degrees Celsius and 58 to 62 percent RH for 10 to 14 days. Once stems snap, trim and jar with humidity buffers, burping daily for the first week and then every few days for another 2 to 3 weeks. The bouquet deepens noticeably by week 4, with a peak flavor window from weeks 4 to 8.
Yield metrics reflect the cultivar’s modernization. Indoors, experienced growers report 550 to 700 grams per square meter in scrog under efficient LEDs at 600 to 700 watts in a 1.2 by 1.2 meter tent. Skilled CO2-enriched rooms at 900 to 1200 ppm can push higher, assuming environmental consistency. Outdoors, single plants can exceed 700 grams and occasionally reach 1000 to 1500 grams in long-season, dry climates.
Outdoor considerations include site selection and season length. The plant prefers full sun and well-drained, slightly acidic soils with robust organic matter. Plant in late spring after frost risk, and use low-stress training to keep canopies low and wind-resilient. In humid regions, aggressive airflow, rain covers, and prophylactic biofungicides like Bacillus subtilis formulations help prevent late-season mold.
Clonal selection is worthwhile if multiple seeds are run. Look for phenotypes with tight internodal spacing, high calyx-to-leaf ratio, and a loud citrus-incense nose by week 7. Track dry yields, trim time, and effect clarity to identify keepers that fit your goals. Once a winner is chosen, mother care with low EC and 18 hours of light preserves vigor for many cycles.
Nutrient troubleshooting is straightforward if monitored weekly. Nitrogen toxicity shows as overly dark, waxy leaves and reduced aroma; reduce N inputs and increase potassium in mid-flower. Calcium deficiency presents as margin necrosis and crinkling on new growth; add cal-mag and stabilize pH. Address issues quickly to keep the long sativa cycle on schedule.
Finally, odor control should not be overlooked. Terpinolene-forward strains broadcast strongly in weeks 6 to 10 of bloom. Use appropriately sized carbon filters and ensure no static pressure losses in ducting. With good environmental and canopy discipline, Arjan's Haze #2 rewards the grower with classic haze character, high resin output, and a reliable, energized effect.
