Written by Ad OpsHistory and Breeding Background
Mr. Sour-R traces its origin to Mr. Hide Seeds, a Spain-based breeder known for modernizing classic profiles through careful selection work. The strain is marketed as an indica/sativa hybrid, reflecting a balanced approach to structure and effects rather than a strict lean to either side. In the European seed scene, Mr. Hide Seeds has earned a reputation for resin-forward hybrids that thrive in Mediterranean climates, and Mr. Sour-R fits squarely within that portfolio.
The name itself hints at a sour-leaning aromatic signature paired with a resin-forward selection, a combination increasingly favored by growers seeking bag appeal and extract yields. While the breeder has publicized the hybrid heritage, the exact parents have not been officially disclosed, a common practice in competitive breeding programs. This secrecy preserves proprietary selections, while growers learn the line through cultivation and phenotype hunting.
Between 2016 and 2020, Spanish and Portuguese growers began reporting consistent vigor, notable stretch at the flip, and unmistakable citrus-diesel top notes from Mr. Sour-R. These field notes aligned with Mr. Hide Seeds’ broader emphasis on stability across environments, from indoor LED rooms to coastal outdoor plots. By the early 2020s, Mr. Sour-R had become a quietly reliable hybrid within hobbyist circles seeking a bright, sour profile with balanced, functional effects.
Genetic Lineage and Breeding Rationale
Mr. Hide Seeds lists Mr. Sour-R as an indica/sativa hybrid, indicating mixed ancestry that likely includes sour-leaning, fuel-forward progenitors. The suffix “Sour” strongly suggests lineage influence from the Sour family—archetypes like Sour Diesel, East Coast Sour Diesel (ECSD), or tangy citrus hybrids often used in Spanish programs. However, because the breeder has not publicly released the parentage, the exact cross remains proprietary.
Grow performance and lab-adjacent reports from European social clubs point to limonene- and myrcene-dominant terpene stacks, a hallmark of many Sour lines. That chemical fingerprint aligns with a breeding rationale aimed at delivering sharp citrus top notes, a gassy mid-layer, and a sweet-herbal base—elements valued for both flower appeal and extract stability. The indica component seems to moderate internodal length and add density, while sativa contributions are evident in the racy, uplifted onset.
Across test grows, phenotypes sort into two practical categories: a taller, more aerated “Sour” expression and a stockier, sweeter “resin” expression. The taller pheno tends to stretch 1.7–2.0× after the flip, with stronger lime-diesel aromatics and looser cluster spacing that resists botrytis in humid rooms. The stockier pheno stretches 1.3–1.5× and can pack extremely dense colas, enhancing yield and unit weight but requiring stronger airflow.
Taken together, Mr. Sour-R appears engineered to merge the market-friendly tang of sour citrus and fuel with modern resin coverage and versatile growth. This strategy reflects Mr. Hide Seeds’ broader trend of remixing classic flavor pillars with contemporary cultivation priorities. The result is a hybrid that performs predictably across training styles while producing a sensory profile that many consumers instantly recognize.
Morphology and Visual Appearance
Mr. Sour-R typically forms a medium-tall frame with strong apical dominance if left untopped, reaching 80–120 cm indoors under moderate intensity lighting. Internodal spacing averages 3–6 cm in vegetative growth, tightening to 2–4 cm on flower sites as calyces stack. The hybrid structure reveals its mixed heritage: flexible branching with enough lignification to support substantial weight by late bloom.
Calyx formation is an area of emphasis on this cultivar, with a notably high calyx-to-leaf ratio that eases trim work and shows well after a light manicure. Buds are often conical-to-ovoid, with a sugared look from abundant capitate-stalked trichomes. Mature flowers exhibit lime-green to medium-green bases, accented by apricot to rust-orange stigmas that deepen with ripeness.
In cooler night temperatures (18–20°C) late in bloom, occasional lavender or mauve hues can blush along bract tips, though Mr. Sour-R is not a strongly anthocyanin-driven cultivar. Resin heads are typically medium-large with clear-to-cloudy heads by week seven of bloom. Growers commonly note a “sparkle” under white LEDs, with trichome coverage extending across sugar leaves and into the petioles.
Aroma and Olfactory Profile
The primary aromatic signature is sour citrus layered over clean fuel, a bouquet many tasters frame as lime, grapefruit zest, and light diesel. Secondary notes include sweet herbal tea and a peppery, earthy undertone consistent with β-caryophyllene presence. On dry rub, the top end becomes brighter and more volatile, while the base notes reveal faint thyme and bay leaf.
In jarred flower, headspace analyses by experienced nose testers consistently emphasize limonene-dominant impressions at first crack. After a 10–12 second aeration, a gassy middle registers, linked to the diesel family’s oxidized monoterpene fragments. By the 72-hour cure mark, the aroma coheses into a layered, sour-forward cube with just enough sweetness to balance the tang.
During cultivation, late-flower rooms carrying Mr. Sour-R exhibit a sharp citrus snap detectable at moderate distances, often prompting carbon filtration upgrades. Compared to classic skunk-loud cultivars, intensity is medium-high but more pointed than musky. Terpene volatility is above average, so maintaining 45–55% RH during late flower helps preserve the brighter top notes pre-harvest.
Flavor and Mouthfeel
On inhalation, Mr. Sour-R delivers a quick burst of tart citrus—lime peel and pink grapefruit—followed by a clean, almost sparkling acidity. As the vapor rolls, a measure of diesel-like fuel appears in the mid-palate, giving the profile length. Exhale resolves with sweet herbal tea, white pepper, and a faint pine edge that lingers for 20–40 seconds.
Combustion at lower temperatures (175–190°C on vaporizers) preserves the limonene-led brightness and noticeably reduces diesel harshness. At higher temperatures or in joints, the profile turns spicier and more resinous, with pepper and bay leaf moving forward. Mouthfeel remains medium-bodied, with a slight astringency typical of sour-dominant terp arrays.
In concentrates, particularly live resin and rosin, the sour-citrus pop intensifies and the fuel component grows more apparent. Washers report that a 3–4% total terp fraction in input material translates to vivid top notes in fresh-press and cold-cure formats. The aftertaste remains clean, avoiding cloying sweetness, which makes repeated pulls appealing to flavor-driven users.
Cannabinoid Profile and Potency
As an indica/sativa hybrid bred by Mr. Hide Seeds, Mr. Sour-R has been reported at moderate-to-high potency in European markets. Anecdotal lab postings from social clubs and dispensary menus place total THC commonly in the 18–24% range, with the majority of samples clustering around 20–22%. Total CBD typically registers low (<1%), with minor cannabinoids like CBG in the 0.1–0.8% range depending on phenotype and harvest timing.
In well-grown indoor batches, decarboxylated THC (d9-THC post-decarb) often tracks near 180–220 mg/g of dry flower, assuming moisture content of 10–12%. Outdoor-grown expressions trend slightly lower on average, at roughly 160–200 mg/g THC, though Mediterranean sun-grown crops can match indoor potency when fertilization and water management are optimized. Total cannabinoids frequently measure 20–26% by weight, capturing THC plus minors.
Potency is influenced by harvest window; pulling at mostly cloudy trichomes with minimal amber tends to maximize THCa while steering effects more energetic. Letting the crop run 7–10 days longer to capture 10–15% amber introduces more CBN via post-harvest oxidation pathways, which some users perceive as a heavier body load. Careful drying at 18–20°C and 55–60% RH preserves potency by minimizing terpenoid volatilization and cannabinoid degradation.
For extractors, Mr. Sour-R offers viable returns, with fresh-frozen ice water hash yields frequently reported at 4–6% of fresh weight for average phenos. Exceptional phenotypes can surpass 6%, though this is less common and relies on heavy trichome density and clean, intact heads. Hydrocarbon extraction captures a broader fraction, but solventless producers appreciate the cultivar’s balance of head size and cuticle resilience.
Terpene Profile and Analytical Data
Mr. Sour-R typically displays a limonene-forward terpene profile, frequently accompanied by β-myrcene and β-caryophyllene as secondary anchors. Many sour-citrus phenotypes also register meaningful amounts of ocimene, with trace linalool and humulene rounding the bouquet. Total terpene content in well-grown indoor flower commonly ranges from 1.5% to 3.5% by weight (15–35 mg/g), with standout batches pushing toward the upper end.
In sensory correlation, limonene explains the bright lime and grapefruit peel impression, while myrcene contributes the herbal-tea softness that follows the initial bite. β-caryophyllene accounts for peppery, woody undertones and can add a mild, warming sensation on the exhale. Ocimene often reads as green-minty or slightly tropical, lifting the mid-palate and contributing to perceived freshness.
From a pharmacological standpoint, limonene is frequently associated with alertness and mood elevation in user reports, though human data remains mixed and context-dependent. β-myrcene has been studied for sedative-adjacent properties at higher doses, which can integrate with THC to modulate the body feel. β-caryophyllene engages CB2 receptors, potentially contributing to perceived anti-inflammatory effects in anecdotal contexts.
Variance is meaningful in hybrid lines, so two Mr. Sour-R phenotypes can distribute terpenes differently while holding a similar flavor family. The taller, “Sour” leaner often concentrates limonene/ocimene for sharper top notes, whereas the stockier resin pheno may present more caryophyllene/humulene for depth. Growers aiming for a citrus-diesel market should prioritize selections with 0.6–1.0% limonene and total terpenes above 2.5% when lab testing is available.
Experiential Effects and Use Cases
Users commonly describe Mr. Sour-R as delivering a clear, uplifted onset within 2–5 minutes of inhalation, often accompanied by a light forehead and cheek pressure. The initial phase tends toward focus and mild euphoria, aligning with the sour-citrus sensory profile. As the session progresses, a balanced body calm emerges without heavy couchlock, particularly when harvested at cloudy trichomes.
Duration averages 120–180 minutes for flower in regular users, with peak psychoactivity in the first 45–75 minutes. Concentrated forms shorten the onset to near-immediate and can extend total duration by 30–50 minutes. Novices may experience stronger head effects at the 20–24% THC level, so smaller titrated doses are advisable at first contact.
Functionally, Mr. Sour-R fits daytime to early evening use for many people, supporting creative tasks, social interaction, and light physical activity. The cultivar’s body component remains present but manageable, which makes it versatile for mixed environments like outdoor festivals or coworking spaces. Late-night use leans more physically relaxing, especially with phenotypes richer in myrcene and caryophyllene.
Tolerance and set/setting play significant roles in the subjective arc, and hydration can moderate the peppery edge of repeated pulls. When vaporized at lower temps, the experience is crisper and less sedative; higher temps skew heavier, especially with hash rosin. Users sensitive to limonene-dominant hybrids should start with 1–2 inhalations and wait 10 minutes before redosing.
Potential Medical Uses and Considerations
While formal clinical trials on Mr. Sour-R specifically are not published, its cannabinoid and terpene pattern maps onto common patient-reported outcomes. The limonene-led profile is often associated with mood elevation and perceived stress reduction, complementing THC’s acute anxiolytic effects for some users. The balanced body component may provide relief for mild to moderate musculoskeletal discomfort without immediate sedation.
In anecdotal contexts, patients have used sour-citrus hybrids for daytime relief from low mood, motivational dips, and task inertia. β-caryophyllene’s CB2 activity aligns with user-reported reductions in inflammatory flare-ups, although evidence remains preliminary and should not replace medical care. For neuropathic tingles or tension headaches, the cultivar’s clear head and gentle body ease can be helpful without blunting cognition.
Dosing strategy matters: microdoses around 2–5 mg THC via vapor or small puffs may support mood and focus with minimal intoxication. For pain episodes, 5–15 mg THC equivalent can offer stronger relief, particularly when combined with a warm-up routine like stretching. Individuals sensitive to THC-associated anxiety may benefit from CBD co-administration (e.g., 5–10 mg CBD per 5 mg THC) to moderate intensity.
Contraindications include a caution for those with panic-prone responses to limonene- or sativa-leaning hybrids; setting and dose titration are key. Dry mouth and dry eyes are the most common side effects, with occasional reports of transient dizziness at high doses. This information is not medical advice; patients should consult a clinician experienced in cannabinoid therapeutics before changing any treatment plan.
Comprehensive Cultivation Guide
Growth habit and vigor: Mr. Sour-R expresses a medium-tall, flexible frame with responsive branching. Under 300–600 μmol/m²/s in veg and 700–1000 μmol/m²/s in bloom, plants maintain tight structure and well-lit mid-canopies. Expect 1.5–2.0× stretch after the flip depending on pheno, training style, and nitrogen carryover.
Environment: Ideal daytime temperatures are 24–28°C in both veg and bloom, with nights at 18–22°C. Maintain relative humidity (RH) at 60–70% in veg and 45–55% in mid-bloom, tapering to 40–50% in late bloom to protect volatile terpenes. Target VPD of 0.9–1.2 kPa during bloom supports gas exchange without overdrying pistils.
Nutrition: In coco and hydro, steer EC around 1.2–1.6 mS/cm in veg and 1.8–2.2 mS/cm during peak bloom, with runoff verifying stability. In soil, aim for a slightly acidic pH of 6.2–6.8; in coco/hydro, hold 5.8–6.2. Calcium at 150–200 ppm and magnesium at 40–60 ppm prevent mid-bloom deficiencies, especially under high-intensity LEDs.
Training and canopy management: Top at the 4th–6th node, then run low-stress training to open the center. A single SCROG layer with 5–6 cm squares works well, adding a second net by week 2–3 of flower if required for cola support. Defoliate lightly around day 21 and again around day 42 to thin fans blocking sites, avoiding more than 20–25% leaf removal per session.
Substrates and irrigation: Mr. Sour-R performs in living soil, peat blends, and coco. In coco, frequent irrigation to 10–20% runoff keeps EC stable and reduces salt creep, typically 1–3 times daily depending on pot size and root development. In soil, allow a gentle dryback between waterings to promote oxygenation; target 10–15% container weight loss before rehydration.
Flowering time and yield: Indoors, expect a bloom window of 56–65 days for most phenos, with the sour-leaning expression finishing faster on average. Well-dialed rooms can produce 450–600 g/m² under 600–800 μmol/m²/s average PPFD, with CO₂ enrichment (900–1200 ppm) supporting the upper range. Outdoors in Mediterranean climates, 600–900 g per plant is feasible from 30–50 L containers with full-season veg.
Phenotype selection: The “Sour” pheno shows more limonene/ocimene and a 1.7–2.0× stretch, with slightly airier clusters that resist mold. The “resin” pheno stretches 1.3–1.5× and develops denser colas with stronger caryophyllene/humulene undertones. For coastal or humid grows, the taller, airier expression is safer; for dry climates or dialed dehumidification, the denser pheno boosts bag appeal and yield.
Pest and disease management: With dense late-flower colas, botrytis risk is moderate where RH exceeds 60% and airflow is inadequate. Maintain 0.5–1.0 m/s canopy air speed and ensure clean under-canopies via lollipopping. Preventive IPM with weekly scouting, yellow sticky cards, and rotating soft-touch foliar controls in veg (e.g., neem alternatives, Beauveria bassiana) keeps common pests like thrips and mites in check.
Irrigation nuances late bloom: Reduce nitrogen by week 3–4 of flower and emphasize phosphorus and potassium to steer flower development. A final 10–14 day fade with balanced EC (1.0–1.2 mS/cm) helps the cultivar finish clean without harshness. Maintain 45–50% RH during the fade to guard terpenes while avoiding excess moisture in dense sites.
Harvest timing: For a crisp, energetic effect, harvest when trichomes are mostly cloudy with 0–5% amber. For a heavier body tone, allow 10–15% amber with pistils receding and calyces swollen. The sour-diesel nose peaks just before significant amber development, so growers should balance aroma intensity with desired effect.
Drying and curing: Dry 10–14 days at 18–20°C and 55–60% RH with gentle airflow that does not directly hit flowers. Target a final water activity of 0.55–0.65 aw before jar cure, then burp daily for 10–14 days, tapering to weekly checks. A 4–8 week cure polishes the diesel facet and rounds the citrus bite, with peak flavor often arriving around week six.
Lighting considerations: Under full-spectrum LEDs, Mr. Sour-R tends to express brighter terpenes and tighter internodes compared to HPS. Keep PPFD at 700–900 μmol/m²/s for most of bloom, nudging to 1000 μmol/m²/s if CO₂ and nutrients are sufficient. Watch for light stress on the taller pheno; maintain 30–45 cm canopy distance depending on fixture intensity and optics.
Outdoor notes: In temperate regions, transplant after frost risk has passed and train early to flatten the canopy for wind penetration. Space plants at 1.2–1.8 m centers to promote airflow, especially for the resin-dense pheno. Organic mulches stabilizing root-zone moisture can trim irrigation volume by 15–25% during peak summer heat.
Post-harvest handling for extracts: For live products, harvest at peak aroma and freeze immediately at −18°C or lower to preserve volatile fractions. In ice water hash, wash gently at 4–7°C, using 120–73 μm bags to capture the most viable heads, with some phenos favoring 90 μm. Cold-cured rosin typically intensifies the sour-citrus front while revealing a deeper herbal base after 5–10 days at 10–12°C.
