Written by Ad OpsOrigins and Breeding History
C5 Haze x Zamaldelica comes from ACE Seeds, a breeder renowned for preserving and expanding classic tropical sativas. The cross pairs the legendary C5 Haze, a celebrated NL#5/Haze selection from the old Nevil lineage, with ACE’s electrifying Zamaldelica. The result is a mostly sativa hybrid intentionally designed to amplify cerebral intensity, aromatic complexity, and long, soaring effects.
ACE Seeds is known for rigorous selection and stability work with landraces and old-school hybrids. By introducing Zamaldelica’s exotic vigor into the C5 Haze frame, ACE targeted improved resin production, higher apex terpenes, and better adaptability to modern indoor cultivation. This cross also sought to keep the classic incense-and-wood Haze spirit intact while adding tropical, spicy, and floral high notes.
The breeding strategy acknowledges that heritage Haze lines can be both spectacular and demanding. C5 Haze x Zamaldelica was positioned to maintain the high ceiling of potency while smoothing cultivation with stronger stems and slightly faster flower set. Early grower reports and ACE’s own positioning place it squarely in the advanced sativa category, with flowering typically extending well beyond 11 weeks but paying off in yield and character.
As a modern update to a storied family, this cross preserves history without being stuck in it. The inclusion of Zamaldelica—derived in part from the elusive Zamal line from Réunion Island—introduces unique terpenes and an unmistakable uplift. Together, the parents create a cultivar that appeals to sativa purists and adventurous growers alike.
Genetic Lineage and Heritage
This cultivar’s genetic backbone blends two pillars: C5 Haze from the Northern Lights #5 x Haze era and Zamaldelica, ACE’s celebrated sativa that includes Zamal genetics. C5 Haze contributes the classic cathedral incense, metallic-sandalwood haze, and the long, potent cerebral ride associated with elite Haze selections. Zamaldelica adds high-altitude vigor, tropical-floral-honey notes, and an energetic, often euphoric tone.
Zamaldelica itself is a complex sativa project that has historically involved Zamal from Réunion Island, intertwined with high-octane African and Asian sativa influences in ACE’s breeding work. Zamal is famous for its carrot-floral aromas and near-psychedelic qualities, and it has a reputation for very long flowering traits. By pairing this with an elite Haze, ACE reinforces the sativa dominance while attempting to tame extreme flowering lengths and improve bud density.
The resulting inheritance is overwhelmingly sativa, often cited as 80–95% sativa-leaning depending on phenotype. Morphologically, that expresses as narrow leaflets, large internodal spacing, and strong phototropic stretch. Chemically, the cross frequently aligns with sativa-typical terpene stacks dominated by terpinolene, ocimene, beta-myrcene, and beta-caryophyllene, with limonene and pinene contributing brightness and clarity.
In effect and behavior, the lineage promises an active, long-lasting experience. The Haze backbone offers structure and depth, while Zamaldelica layers in a distinctly tropical sparkle. The union showcases why ACE Seeds has become a go-to for modern interpretations of heritage sativas.
Appearance and Morphology
C5 Haze x Zamaldelica typically shows lanky, architectural growth with long internodes and narrow, scythe-like leaflets. In vegetative growth, expect fast vertical gains and a tendency to node stack at wider spacing compared to indica-leaning hybrids. Plants can stretch 200–300% after the flip to 12/12, making canopy management essential indoors.
During flowering, spear-shaped colas form with a high calyx-to-leaf ratio, often presenting foxtailing in late maturity. Buds can range from lime green to pale jade, with curling pistils that progress from ivory to bright orange and then burnished copper. Trichome coverage is abundant, lending a frosty glare that becomes especially pronounced after week 8.
Phenotypic variability exists between a more incense-forward Haze type and a fruit-spice Zamaldelica leaner. The Haze-leaning phenotype often shows more incense-wood aromatics and slightly longer internodes, with buds that are voluminous but not overly compact. The Zamaldelica-leaning phenotype may set slightly quicker, develop sweeter aromatics, and express tighter stacking, though still airy compared to indica standards.
Strong apical dominance is common, though side branches can be vigorous and benefit from topping or low-stress training. With proper trellising, secondary colas develop into substantial spears that rival the main top. Outdoors, plants can reach 2.0–3.0 meters in height in favorable conditions, while indoor heights need to be constrained with training and photoperiod management.
Aroma and Flavor
Aromatically, C5 Haze x Zamaldelica covers a wide sativa spectrum from church incense and sandalwood to tropical fruit, citrus peel, and sweet spice. Many growers report an initial waft of classic haze incense with metallic-lime edges, followed by an underlayer of floral honey and green mango. The Zamal influence can impart a subtle carrot-floral accent and a clean, herbaceous thread reminiscent of fresh lemongrass.
On the palate, terpinolene-driven flavors often present as bright, resinous, and slightly effervescent. Expect notes of lime zest, green mango, and sweet basil overlaying a dry wood-incense backbone. In some phenotypes, ocimene and limonene bring sparkling citrus and slightly tropical top notes, while beta-caryophyllene contributes a peppery, woody finish.
Vaporizing at 175–190°C highlights the citrus-floral facets and preserves volatile terpenes. Smoking or combusting tends to emphasize incense, cedar, and pepper, with a lingering aftertaste akin to spiced sandalwood and light tropical fruit. Late-cure buds (21–28 days) often deepen into resinous incense and candied peel, while a shorter 10–14 day cure leans brighter and greener.
Aroma intensity is high, particularly in late flower when terpene totals peak, so carbon filtration is recommended indoors. Jar aroma evolves notably over the first two weeks of curing as monoterpenes settle and sesquiterpenes become more prominent. Proper storage at 16–20°C and 55–62% relative humidity maintains the bouquet for months without excessive terpene loss.
Cannabinoid Profile and Potency
As a mostly sativa hybrid from ACE Seeds, this cultivar typically expresses high THC with minimal CBD. Across comparable ACE sativa lines and reported grower lab tests, THC commonly falls in the 18–26% range by dry weight, with exceptional phenotypes occasionally surpassing 26%. CBD is usually very low, often under 0.5%, and frequently below 0.1% in sativa-dominant haze hybrids.
Minor cannabinoids can show meaningful variation, with CBG sometimes present in the 0.2–1.0% range. CBC is generally trace-level but may contribute to the entourage effect at 0.05–0.2%. Total cannabinoids in well-grown flowers often measure 20–28% when THC is high and minor cannabinoids are detectable.
Potency perception is amplified by the terpene profile, especially terpinolene, ocimene, and limonene, which can subjectively sharpen the psychoactivity. Users routinely describe a fast onset within 2–5 minutes when smoked, peaking around 20–30 minutes, and a total duration of 2.5–4.5 hours depending on dose and tolerance. In oral formats, onset is 30–90 minutes with effects lasting 4–8 hours, contingent on metabolism and formulation.
Because of the high-THC, low-CBD composition, inexperienced users should start with low doses to mitigate anxiety or overstimulation. Sensitivity varies widely, but stepwise titration helps identify a comfortable zone. Consumers seeking gentler effects may blend with CBD-dominant material to modulate intensity.
Terpene Profile and Volatile Chemistry
The terpene profile often aligns with classic Haze signatures augmented by tropical Zamal brightness. In comparable ACE sativa analyses, total terpene content commonly ranges from 1.0–2.5% of dry weight under optimal cultivation and curing. Terpinolene frequently features as a lead terpene in sativa-type expressions, accompanied by beta-myrcene, beta-caryophyllene, ocimene, limonene, and pinene.
Approximate ranges reported in similar sativa hybrids are as follows: terpinolene at 0.3–1.0%, beta-myrcene at 0.2–0.8%, and beta-caryophyllene at 0.1–0.5% of dry weight. Limonene and ocimene commonly register at 0.1–0.4% and 0.1–0.3% respectively, with alpha- and beta-pinene together contributing 0.05–0.3%. Linalool, nerolidol, and humulene may appear in the 0.03–0.15% band, deepening the floral, woody, and herbal strata.
Terpinolene correlates with bright, crisp, piney-citrus scents and is prevalent in many energetic sativa chemotypes. Ocimene and limonene bring a sweet, tropical-citrus lift, while beta-caryophyllene adds peppered wood and may interact with CB2 receptors. Myrcene in moderate amounts can lend body and cohesion without tipping the profile into sedative territory.
Volatile behavior changes across the dry and cure period, with lighter monoterpenes off-gassing faster if exposed to high temperatures or airflow. Keeping drying temperatures between 18–21°C and maintaining 55–60% RH preserves terpenes, while slow curing helps sesquiterpenes bloom. Minimizing light exposure and oxygen ingress further retains both terpenes and cannabinoids over time.
Experiential Effects and User Reports
C5 Haze x Zamaldelica is commonly described as cerebral, energetic, and long-lasting. The initial uplift arrives quickly, often with a sense of clarity, creative drive, and sharpened sensory perception. As it settles, many users note an electric, immersive focus that can be ideal for music, brainstorming, or outdoor activity.
The plateau can last 60–120 minutes before gradually descending into a calm, reflective cruise. Anxiety sensitivity varies; at higher doses, a minority of users report racing thoughts or overstimulation, consistent with high-THC, terpinolene-forward sativas. Those prone to such reactions often fare better with microdosing or by pairing with CBD to soften the edges.
Motor coordination is usually preserved better than with heavier indica chemotypes, but it can still be affected at strong doses. For productivity use, users often keep sessions to 1–3 inhalations and wait 10 minutes before deciding on more. Hydration and a light snack may help manage intensity and extend comfort during longer sessions.
Tolerance and set-and-setting strongly influence the experience, as with all potent sativas. Calm environments, good hydration, and purposeful activities can guide the high toward euphoria and creativity. Many enthusiasts reserve larger doses for weekends or hiking, where the expansive headspace is an asset rather than a liability.
Potential Medical Uses and Safety Considerations
Although formal clinical data on this specific cross are limited, its high THC and sativa-leaning terpene profile may suit certain symptom profiles. Users anecdotally report mood elevation, increased motivation, and reduced fatigue, effects commonly associated with terpinolene-limonene rich chemotypes. In practice, some patients explore daytime use for low mood, apathy, or focus challenges, though results vary and individual response is unpredictable.
The peppery beta-caryophyllene and pinene content could provide complementary anti-inflammatory and alertness-supporting qualities, respectively. However, high THC can exacerbate anxiety or tachycardia, especially in inexperienced or sensitive users. For those prone to anxiety, dosing low (1–2 mg THC vaporized or 2.5–5 mg orally) and co-administering CBD are practical strategies.
Some consumers use sativa-leaning strains to cope with situational fatigue or nausea, but patient responses can diverge widely. Importantly, high-THC products are not suitable for everyone and may interact with medications, especially those metabolized by CYP450 enzymes. Individuals with cardiovascular risk, a history of psychosis, or pregnancy should avoid high-THC products unless advised by a clinician.
This information is educational, not medical advice. Anyone considering therapeutic use should consult a healthcare professional familiar with cannabinoid medicine. Start low, go slow, and track outcomes to assess fit and tolerability.
Comprehensive Cultivation Guide: Environment, Timing, and Yield
C5 Haze x Zamaldelica is an advanced sativa-leaning cultivar that rewards attentive growers. Indoors, plan for 77–98 days of flowering (11–14 weeks), with finish time influenced by phenotype, light intensity, and nutrient management. Outdoors at latitudes around 40°N, harvest often falls between late October and mid-November; in tropical climates it can finish later if allowed to mature fully.
Yield potential is high when canopy is properly controlled. Indoors with high-efficiency LEDs and optimized feeding, expect 450–700 g/m² in dialed-in SCROG or multi-top setups. Outdoor plants in 50–100 L containers or in-ground can surpass 500–1000 g per plant under long-season, high-sun conditions.
Temperature targets favor warm, stable conditions. Aim for 24–28°C day and 18–22°C night; with supplemental CO2 (800–1200 ppm), day temperatures up to 29–30°C are acceptable. Keep VPD near 1.1–1.3 kPa in mid-flower and 1.3–1.5 kPa late-flower to mitigate botrytis risk while sustaining resin production.
Relative humidity should run 60–70% in veg, 45–55% in early flower, and 38–45% in late flower. Adequate air exchange and canopy airflow are crucial, as long-flowering sativas can be vulnerable to microclimates deep in the canopy. Use oscillating fans and ensure at least 30–60 air changes per hour in tents or sealed rooms with filtration.
Feeding, Training, and Irrigation Strategy
Sativa-leaning hazes prefer balanced, moderate feeding. In coco or hydro, set EC near 1.2–1.6 in veg and 1.6–2.0 in flower, tapering nitrogen after stretch while increasing phosphorus and potassium from week 5 onward. Soil growers can use a living-soil approach with top-dressed amendments, targeting a gentle nutrient release curve.
pH targets are 5.8–6.2 for hydro/coco and 6.2–6.8 for soil. Keep calcium and magnesium adequate, especially under LED lighting where transpiration can be lower and Ca/Mg demand higher. Foliar calcium at 0.2–0.4 g/L during early veg can help avoid deficiency without overloading the root zone.
Training is essential due to aggressive stretch. Topping once or twice in late veg, combined with low-stress training and an early SCROG, creates a flat canopy that maximizes light efficiency. Expect plants to double or triple in height after flip; flipping from seed or at 20–25 cm height is common in small spaces.
Irrigation should be frequent but measured, prioritizing oxygenation of the root zone. In coco, multiple small irrigations reach 10–20% runoff daily at peak uptake; in soil, water deeply and allow near-surface drying to encourage root vigor. Avoid keeping medium saturated during low transpiration periods, as sativa roots can be sensitive to hypoxia.
Lighting, Canopy Management, and CO2
Provide 400–600 µmol/m²/s PPFD in veg and 700–1000 µmol/m²/s in flower for efficient photosynthesis. With supplemental CO2 at 900–1200 ppm, PPFD can be pushed to 1000–1200 µmol/m²/s if nutrients and irrigation are optimized. A daily light integral of 35–45 mol/m²/day in flower is a realistic target for high-yield setups.
SCROG nets help distribute vigor across 10–16 colas per plant, reducing larf and improving airflow. Lollipopping the lower third of branches by the end of week 3–4 of flower directs energy to top sites where light intensity is highest. Light defoliation can be beneficial around day 21 and 42 of flower to remove large fan leaves that shade bud sites.
Maintain even canopy height within ±10 cm to avoid hot spots and underlit zones. Haze-dominant tops can outpace the pack; gentle sup
