NEWEarn a verifiable digital badge for every course, add it to LinkedIn in one click. Launch pricing ends Nov 1 →A verifiable digital badge for every course. Launch pricing ends Nov 1 →
Tall outdoor cannabis plant growing in a trellised row at a Colorado farm

Sour Cookies strain

Bred by Mamiko Seeds · Sour Diesel × GSC

Strain facts

Checked Oct 21, 2026 · 4 sources

Sour Cookies is a hybrid that's intermediate to grow. It was bred by Mamiko Seeds from Sour Diesel and GSC. Its THC is about 22% (sources say 15–26%), higher than 57% of the 2,347 strains in our database that list THC. It flowers in about 8 weeks (sources say 6–9 weeks) and is listed for an October outdoor harvest.

Type
Hybrid
THC
About 22%15–26% across 3 sources
Top terpenes
  1. Caryophyllene peppery, spicy
  2. Limonene citrus
Commonly reported effects
Talkative, relaxed, focused, tingly and giggly
Flavors
Diesel
Lineage
Sour Diesel × GSC
Breeder
Mamiko Seeds
Grow difficulty
Intermediate1 source
Flowering
About 8 weeks6–9 weeks across 2 sources
4 sources for this profile
  1. CTU strain dataset (public strain listings)

Grow facts

  1. SeedFinder (breeder listing: Mamiko Seeds) Grow setting
  2. AllBud (strain database) THC
  3. Crop King Seeds (seed bank) CBD, difficulty, flowering, THC, yield indoor and yield outdoor

Grow facts come from the breeder first, then seed banks and strain databases. With 2 sources we show the range and the middle; with 3 or more, the range and the median, after leaving out values far from the rest. The breeder's own value is the anchor, unless it is far from every other source (outside their range and more than 20% from their median); then we show the full range and the median of all of them. A fact from a single source is marked "1 source", and a fact no source lists is left out. Yields are converted to one unit: indoor per square meter, outdoor per plant.

CTU writes every profile from these facts; we do not copy other sites' descriptions. Values that are a generic default in the source data are left out. Last checked Oct 21, 2026.

Source: CTU strain dataset (public strain listings and breeder info, checked by CTU), verified Oct 2026. Potency, flavor and effects vary by grower, batch and plant. Facts no source lists are left out.

How to grow Sour Cookies

The grow facts a breeder or public strain listing gives for Sour Cookies.

Flowering time
About 8 weeks6–9 weeks across 2 sources. Faster than 80% of strains with a listed time
Yield indoor
About 400 g/m²1 source
Yield outdoor
About 550 g per plant1 source
Difficulty
Intermediate1 source. One of 884 intermediate-rated strains
Grow setting
Indoor and outdoor1 source
Outdoor harvest
OctoberLater than 23% of strains with a listed month

Flowering window (weeks after the switch to 12/12)

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14

Listed outdoor harvest (northern hemisphere)

  1. Jul
  2. Aug
  3. Sep
  4. Oct
  5. Nov
  6. Dec

Sources: the breeder, seed banks and strain databases listed under sources, checked Oct 2026. Percentages compare with every strain in our database that lists the same fact.

Learn to grow Sour Cookies: Indoor & Outdoor Growing course, $199

About Sour Cookies

Sour Cookies is a hybrid cannabis strain bred from Sour Diesel and Girl Scout Cookies, featuring a THC range of 18-26%. This strain offers a balanced genetic profile with notable dense, resin-heavy buds that require careful airflow management. Its cultivation requires moderate nutrient input and benefits from early training techniques due to its moderate stretch. Sour Cookies appeals to growers seeking a potent, flavorful plant with a medium flowering time and substantial indoor and outdoor yields.

Effects people report

The high from Sour Cookies begins with an uplifting cerebral euphoria that stimulates creativity and focus. As the effect matures, it shifts towards a soothing body relaxation without heavy sleepiness, lasting up to two hours. This balanced effect makes it suitable for daytime use, with a nuanced peak that blends mental clarity with physical calm. Harvesting when trichomes are mostly cloudy with some amber highlights enhances the calming body sensation.

Flavor and aroma

On opening the jar, Sour Cookies releases a pungent diesel aroma with doughy and cheesy undertones. The inhale presents a sour, nutty flavor with hints of hash and fuel, while the exhale reveals a baked cookie sweetness. Proper curing accentuates the complex terpene profile, softening the sharp diesel notes and balancing the sour citrus and earthy nuances.

Growing notes

Sour Cookies performs well both indoors and outdoors, though indoor environments offer better control over its moderate stretch and nutrient sensitivity. Indoors, apply topping in week 3 of veg and initiate a SCROG setup before flowering to manage its vertical growth and maximize light penetration. Maintain relative humidity around 50-60% during week 2 of veg, reduce to 40-50% by week 2 of flower, and further lower to 35-45% by week 6 of flower to prevent mold in the dense colas. Temperatures should start at 70-75 deg F in week 1 of veg, then shift to 65-80 deg F during weeks 3 to 7 of flowering, avoiding heat spikes that can degrade terpenes. Begin feeding at 0.8 EC in week 1 of veg, ramping slowly to 1.2 EC by week 4 of flower, tapering off in the final two weeks. Aim for PPFD levels of 400-600 µmol/m²/s in veg and 600-900 µmol/m²/s in flower, as the plant tolerates moderate light intensity well. Harvest when trichomes are mostly cloudy with about 10% amber to balance uplift and body effects. Yield optimization relies on canopy management and airflow to mitigate mold risk in dense buds while maintaining resin production.

Grower tips

  • Top once in week 3 of veg to encourage even canopy development
  • Initiate SCROG training before flowering for light penetration
  • Maintain humidity at 50-60% in week 2 of veg, reducing to 40-45% from week 6 of flower
  • Start feeding at 0.8 EC and increase by 0.1 weekly until reaching 1.2 EC by week 4 of flower
  • Keep temperatures between 70-75 deg F in week 1 of veg and 65-80 deg F during weeks 3 to 7 of flower avoiding spikes
  • Target PPFD of 600 µmol/m²/s during flower
  • Harvest at mostly cloudy trichomes with 10% amber for balanced effects
  • Avoid overwatering early to prevent root issues
  • Ensure strong airflow to prevent mold in dense buds

Common mistakes

  • Overwatering early leading to root diseases
  • Overfeeding in flower causing nutrient burn
  • Neglecting late-flower humidity control raises mold risk in dense colas
  • Delaying topping past day 21 of veg results in uneven canopy and reduced yield

Expert insight

Because Sour Cookies exhibits moderate stretch especially early in flowering, starting training methods such as topping and SCROG in late veg prevents uneven canopy development and optimizes light exposure. Its high bud density necessitates strong airflow and humidity control to mitigate mold risks during late flower.

Who should grow Sour Cookies?

Growers with controlled indoor environments who use topping or SCROG to manage moderate stretch and maximize yield; outdoor cultivators in dry, warm Mediterranean climates where mold risk is lower and sunlight is ample

How it compares

Compared to Hawaiian Snow, Sour Cookies has higher resin production and a more pungent diesel flavor; unlike Blueberry Dream, Sour Cookies requires moderate nutrient sensitivity and more training due to its stretch; relative to Code Blue, Sour Cookies has a slightly shorter flowering time and denser buds requiring careful humidity control

Sour Cookies FAQ

What is the THC level of Sour Cookies?

Sour Cookies typically contains THC levels ranging from 18% to 26%, making it a potent hybrid strain. The exact potency can depend on cultivation methods and phenotype variations from the genetics. Always check lab results for precise THC content in your specific batch.

Is Sour Cookies indica or sativa?

Sour Cookies is a balanced hybrid derived from Sour Diesel (sativa) and Girl Scout Cookies (indica). This results in a roughly equal mix of indica and sativa traits, although the exact ratio can vary by phenotype. The hybrid nature offers both cerebral stimulation and body relaxation.

How long does Sour Cookies take to flower?

Sour Cookies typically flowers within 6 to 8 weeks, which is moderate in duration for hybrid strains. This flowering time allows for respectable resin development without an excessively long grow cycle. Proper environmental management can optimize this flowering window for best results.

Is Sour Cookies easy to grow?

Sour Cookies is best suited for growers with some experience due to its moderate nutrient sensitivity and stretch. It responds well to training methods like topping and SCROG, which help manage its growth. Indoor cultivation offers more control to mitigate mold risk in its dense buds, making it moderately challenging for beginners.

What does Sour Cookies taste like?

Sour Cookies has a complex flavor profile featuring pungent diesel and nutty notes with a sour, cheesy undertone. On exhale, a baked cookie sweetness emerges, enhanced by proper curing. This mixed terpene profile creates a rich and layered taste experience appreciated by connoisseurs.

Sour Cookies family tree

Parents and the strains bred from it, from published lineage.

Parents

GSC

This strain

Sour CookiesHybrid · 15–26% THC · 6–9 wk

Bred from it

HeliumCheetah Piss x Sour Cookies

Similar strains

Matched on shared parents, top terpenes, type and THC. Never on medical use.

Sativa

Hawaiian Snow

THC
16–24%
Flowering
10–14 wk
Terpene
Myrcene
Effect
Giggly
Difficulty
Advanced
Height
Very tall
Save
Sativa

Blueberry Dream

THC
17–21%
Flowering
8–12 wk
Terpene
Myrcene
Effect
Focused
Difficulty
Intermediate
Save
Hybrid

Code Blue

THC
22%
Flowering
9.5–10.5 wk
Terpene
Pinene
Effect
Euphoric
Save

Hybrid strainsCaryophyllene strainsDiesel strainsStrains bred from Sour Diesel

Where to buy

Find licensed dispensaries in your state

Only state-licensed stores, checked against official license lists.

Is cannabis legal where you live?

Grow it

How to grow Sour Cookies

Flowering time, height and difficulty from the sources, then the full method in the Growing course.

Related strains

Parent: Sour Diesel

1 database strain lists it as a parent. All strains A–Z

Medical Disclaimer
The information on this website is for educational purposes only and is not intended as medical advice. Always consult a qualified healthcare professional.
Legal Compliance Disclaimer
Cannabis remains illegal under U.S. federal law. Education provided is intended only for jurisdictions where cannabis activity is legal. Users are responsible for understanding local laws.
Guarantee
7-day money-back guarantee · Refund Policy
  • Cannabis Training University 600 17th St, Suite 2800 Denver, CO 80202
© 2026 Cannabis Training University. All Rights Reserved. Cannabis Training University® is a registered trademark of Online Training Providers LLC.

Copyright Cannabis Training University, a subsidiary of Online Training Providers. © 2026. All Rights Reserved.

Medical Disclaimer: The information on this website is for informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition.
Legal Compliance: Cannabis remains federally illegal. Products and information are intended only for jurisdictions where cannabis use and possession is legal.
By using this site, you affirm that you are of legal age (21+) and responsible for understanding your local laws.

Divider Text
7-day money-back guarantee. See our Refund Policy at /refund-policy/.