What Is the Sour Patch Kids Strain?
The Sour Patch Kids strain is a sativa-dominant hybrid bred from Candyland and Sour Diesel — two genetics that pull in completely opposite directions and somehow land perfectly in the middle. Candyland brings structure, sweetness, and manageable internodal spacing. Sour Diesel brings the fuel, the stretch, and the cerebral punch. The result is a plant that smells exactly like what the name suggests: sweet candy up front, sharp citrus-diesel on the back end. Terpene-wise, you're looking at a limonene and myrcene-dominant profile with detectable caryophyllene, which is why the cure matters so much on this one — cut corners there and you lose the whole point of growing it.
If you're tracking this grow, set up your journal now using the Grow Schedule Planner so you can map out defoliation days, flip date, and estimated harvest windows before you even start.
Sour Patch Kids Strain: Phenotype Variation and What to Expect
SPK throws two primary phenotypes from most seed runs, and knowing which one you've got before you flip to 12/12 will save you a lot of frustration.
- Candyland-leaning pheno: Tighter internodal spacing, shorter overall height, denser bud structure, slightly sweeter aroma. More sensitive to aggressive defoliation — go lighter on cuts.
- Sour Diesel-leaning pheno: More aggressive vertical stretch (can hit the high end of that 80–120% range), airier buds that need better airflow, stronger fuel and citrus nose. Can handle a more thorough defoliation at day 42.
Phenotype selection matters most if you're running clones. Take cuts from multiple seedlings during veg, then pick the structure that fits your canopy and tent height before you commit to a mother.
Vegetative Stage: Training the Sour Patch Kids Strain Before Flip
The stretch on SPK is real and it's aggressive. If you don't address structure during veg, you'll be fighting a jungle by week 4 of flower. Here's what to do before you flip:
Topping
Top once when the plant has 5–6 nodes, then top again 10–14 days later once recovery is complete. This gives you 4–8 main colas that can be spread evenly across your net. If you're newer to these techniques, read through our Fimming vs Topping Cannabis guide before you make your first cut — the timing matters more than most growers realize.
LST and SCROG
Run low-stress training (LST) continuously throughout veg to flatten and spread growth tips. Install your SCROG net at around 30–40cm above your medium, weaving new growth through as it pushes up. A second net layer at 50–60cm is worth it if you're running tall containers or expect significant stretch. Keep the canopy even — every tip in that net should be at the same height before you flip.
Veg Environment
- Temperature: 72–80°F (22–27°C)
- VPD: 0.8–1.0 kPa
- PPFD: 400–600 µmol/m²/s during early veg, ramping to 600–800 µmol/m²/s by late veg
- pH (soil): 6.2–6.8 | pH (coco): 5.8–6.2
- EC (feed): 1.2–1.8 mS/cm
Use the Grow Light Calculator to confirm your PPFD targets are actually being hit at canopy level — SPK's wide spread after training means edge coverage matters as much as center intensity.
Flowering Stage: Week-by-Week Priorities
SPK's flowering window runs 63–70 days. Most experienced growers target days 65–68 for the best balance of terpene expression and cannabinoid maturity. Here's how to manage the key milestones:
Weeks 1–2: Transition and Stretch Management
SPK starts stretching from day 3 of flip. Don't panic. Continue weaving new growth through your SCROG net daily. If you didn't install a net, this is your last window to run LST tie-downs to horizontal stakes before the stems lignify. Raise lights incrementally to maintain 800–1,000 µmol/m²/s at canopy without burning tips.
Day 21: First Defoliation
This is the most important cut of the entire grow. Remove all large fan leaves that are blocking bud sites — specifically anything sitting directly on top of a developing node. Don't strip the plant; remove maybe 20–30% of total leaf mass. Leave any fan leaf that isn't directly shading a bud site. On the Candyland-leaning pheno, be conservative — pull the obvious blockers only.
Weeks 3–6: Nutrient Heavy Phase
SPK responds well to a phosphorus-heavy feed program once stretch slows (typically by day 25–28). Run your PK booster from day 21 through day 49. Optimal EC in this window is 2.2–2.8 mS/cm in coco, slightly lower in living soil. Keep pH dialed at 6.0–6.2 in coco and 6.4–6.8 in soil — this is not the time to let pH drift. Use the Nutrient Deficiency Identifier if you see yellowing that isn't part of normal nitrogen drawdown.
Day 42: Second Defoliation
A lighter pass this time — target leaves that have grown back over bud sites since day 21, and anything lower in the canopy that's living in permanent shadow. This defoliation is about airflow more than light penetration at this stage. Humidity should be sitting at 40–45% RH by now; if it's not, fix that before you cut.
Weeks 7–9: Finish and Flush
Trichome monitoring starts day 49. You're looking for cloudy trichomes across the whole bud surface first, then waiting for 10–20% amber development. Sour-leaning phenotypes can hit that profile as early as day 63 — don't assume you have more time than you do. If you're running a salt-based nutrient line, begin flushing 10–14 days before your projected harvest. Organic growers can skip the flush and focus on late-stage hydration only.
Environment During Flowering
- Temperature: 70–80°F (21–27°C) lights-on; aim for a 10°F drop lights-off in late flower to encourage terpene density
- Humidity: 45–50% RH weeks 1–4; drop to 40–45% weeks 5–7; finish at 35–40% the final two weeks
- VPD: 1.0–1.4 kPa mid-flower; 1.4–1.6 kPa late flower
- CO₂: If sealed room, run at 1,000–1,200 ppm with PPFD at 900–1,100 µmol/m²/s
- Airflow: SPK's density makes it prone to bud rot if airflow stagnates — oscillating fans pointed at the canopy (not directly into buds) are non-negotiable
Drying and Curing the Sour Patch Kids Strain
The terpene profile on SPK — specifically the limonene and myrcene content — is volatile. A rushed dry or poor cure wipes out what makes this strain worth growing in the first place. This is where most growers leave yield quality on the table.
Drying
Hang whole branches (or whole plants if space allows) in a dark room at 60–70°F with 55–60% RH. Airflow should be gentle and indirect — a small fan circulating air in the room is enough. Target 7–10 days minimum. The stem snap test is your readiness indicator: when small stems break cleanly rather than bend, you're ready to trim and jar. Don't rush this phase. Every day under 7 days at proper conditions is terpene loss.
Curing
Trim into airtight glass jars — fill to about 75% capacity. For the first week, burp daily for 10–15 minutes to release CO₂ and excess moisture. If your hygrometer reads above 65% RH inside the jar after closing, leave the lid off for an additional 30–60 minutes before sealing. Target 58–62% RH inside the jar for the cure. After week one, burp every 2–3 days. The minimum cure for SPK is 3–4 weeks; 6–8 weeks is where the flavour really develops. Use the Dry & Cure Timer to track your burping schedule and RH readings across jars.
Yield Expectations
Well-grown SPK under optimized indoor conditions can push past 500g/m². Realistically, expect 350–450g/m² on a first run as you dial in the phenotype. Growers on Grow Guide's platform run predominantly indoor (73.7% of tracked grows) in soil (63.3%), which is a solid setup for SPK — the buffering capacity of soil suits this strain's nutrient transitions well. Use the Yield Calculator to model your specific light footprint and plant count before you commit to a grow plan.
Sour Patch Kids Strain: Common Problems and Fixes
- Stretch exceeds tent height: Supercrop the tallest colas by pinching and bending the stem 90° — it heals within 48 hours and redirects energy to lower sites.
- Nutrient burn at transition: Drop EC by 0.3–0.4 for 3–5 days, flush lightly, then resume at the corrected level.
- Bud rot in dense colas: Reduce humidity immediately, increase airflow, and remove affected material fully. Prevention is the only real answer — don't let RH exceed 45% after week 5.
- Terpene loss in dry: Likely too fast (under 7 days) or too warm (above 70°F). There's no recovery — avoid it next run.
For a broader look at the full indoor growing process that supports a SPK run from seed to harvest, see our guide on How to Grow One Cannabis Plant Indoors (2026), and check the Terpene Explorer to dig deeper into SPK's limonene and myrcene expression at different harvest windows.
Frequently Asked Questions
How long does the Sour Patch Kids strain take to flower?
SPK typically finishes in 63–70 days from flip to harvest. Most growers hit the sweet spot at days 65–68. Sour Diesel-dominant phenotypes tend to run longer; Candyland-dominant phenos can finish closer to day 63.
How much does the Sour Patch Kids strain stretch during flowering?
Expect 80–120% height increase from the start of flip to peak stretch (usually around day 21–28). A plant that's 60cm tall at flip can easily reach 120–130cm. Plan your canopy management — SCROG or aggressive LST — before you flip.
What yield can I expect from Sour Patch Kids indoors?
Under optimized indoor conditions with proper training and dialed-in nutrition, SPK has been reported at over 500g/m². A realistic first-run target with good technique is 350–450g/m². Use the Yield Calculator to model your specific setup.
Is the Sour Patch Kids strain good for beginners?
It's manageable but not ideal as a first grow. The significant stretch, phenotype variation, and sensitivity to defoliation timing mean it rewards growers who have at least one or two grows behind them. If it's your first run, focus on nailing the SCROG setup early and don't over-defoliate.
What are the dominant terpenes in Sour Patch Kids?
Limonene and myrcene are the primary terpenes, with caryophyllene as a notable secondary. Limonene delivers the citrus-sour edge; myrcene adds the candy sweetness and body. A slow cure of 6–8 weeks is what preserves this profile — heat and speed kill both.
References
- Fresh Bros (2024). Sour Patch Kids Strain Review: Cannabinoid and Terpene Profile Overview. Reviews the genetics, aroma compounds, and reported effects of the Candyland × Sour Diesel cross. freshbros.com
- Joint Commerce Cannabis Blog (2025). Sour Patch Kids Strain: A Comprehensive Strain Guide. Covers cultivation-specific data including stretch percentages, defoliation timing (day 21 and 42), flowering duration, and 500g/m² yield potential. app.jointcommerce.com
- MMJ.com (2024). Drying and Curing Cannabis: A Complete Guide. Details evidence-based protocols for hang-drying at 60–70°F / 55–60% RH and jarred curing with daily burping for terpene preservation. mmj.com
- Grow Guide Platform Data (2026). Internal grow journal dataset: 1,000 tracked cannabis grows. Shows 73.7% of users grow indoors, 63.3% in soil medium — relevant context for SPK cultivation environment recommendations.
- Jorge Cervantes (2015). The Cannabis Encyclopedia. Van Patten Publishing. Standard reference for VPD targets, PPFD ranges by growth stage, and nutrient EC management across flowering phases — foundational data applied throughout this guide.
