GMO Cookies feminized cannabis plant in flower

Feminized seeds

ChemdawgxGirl Scout Cookies

THC: 26-30%
Bloom: 9-10 wks
Yield/sq ft: 1.6-2 oz
Level: Moderate

GMO Cookies Feminized Seeds

From $65.00

Garlic, diesel and onion over a deep cookie base. A heavy-hitting Chemdawg x Girl Scout Cookies cross that rewards a patient 9-10 week bloom with big, oily yields.

THC26-30%
Bloom9-10 weeks
Height4-5 ft indoors
LevelModerate

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SKU: BMS-GC-FEMXX Categories: Feminized Seeds, High THC Seeds, High Yield Seeds, Hybrid Seeds, Indica Seeds, Indoor Seeds

Quick answerGMO Cookies is an indica-dominant hybrid bred from Chemdawg x Girl Scout Cookies. It is famous for a savory garlic, diesel and onion aroma, reported THC of 26-30%, a long 9-10 week flowering time indoors and heavy yields of 1.6-2 oz per square foot.

GMO Cookies at a glance

THC26-30%Supplier reported. A top-tier potency range for experienced consumers.

Flowering9-10 wksCounted from the switch to 12/12

Indoor yield1.6-2 ozPer sq ft with a full, trained canopy

Height4-5 ftIndoors. 6-7 ft outdoors

Outdoor yield25+ ozPer plant in full sun

Breeding valueA savory parent behind newer crossesIts garlic-and-fuel profile passes on strongly, which is why it shows up in modern lineages like Modified Grapes

What is the GMO Cookies strain?

GMO Cookies, often shortened to GMO and sometimes listed as Garlic Cookies, joins two pillars of American cannabis. Chemdawg is the old-school fuel strain behind a whole family of diesel cultivars, and Girl Scout Cookies is the California dessert line that reshaped modern breeding. Put them together and the Chem side wins the argument on smell and shape, while the Cookies side quietly adds resin and depth.

The three letters are a nod to the nose. Many people read GMO as garlic, mushroom and onion, and a cured jar backs that up: savory, funky and closer to a kitchen than a candy shop. It is the strain people reach for when they are tired of sweet dessert profiles and want something that smells unmistakably loud.

Growers and breeders respect it for another reason. The savory profile is strongly heritable, so it carries into its offspring, and crosses such as Modified Grapes keep a clear thread of that garlic funk. These feminized seeds are bred to produce female plants, so each one you germinate is aimed at resinous flower rather than pollen.

ChemdawgGirl Scout Cookies

Chemdawg x Girl Scout CookiesFeminized line

GMO Cookies

How it feels

The onset is commonly described as slow and warm, followed by a deep body heaviness, a strong appetite and a sleepy end. Most people treat it as a late-evening strain.

First 15 minutesQuiet, creeping lift
A mellow, warm euphoria that builds gradually rather than hitting at once.
30 to 90 minutesDeep body weight
Heavy, long-lasting relaxation, often with a serious case of the munchies.
2 to 3 hoursLights out
Many consumers report drifting off to sleep as the session winds down.

Commonly reportedRelaxedSleepyHungryEuphoric

Because the onset creeps, take a small amount and wait before having more. Commonly reported downsides include dry mouth and dry eyes, and some people report anxiety or dizziness at high doses. General reports, not medical guidance.

Aroma, flavor and terpenes

Pungent garlic and raw onion over sharp diesel, settling into a damp, earthy finish. This is one of the loudest strains you can grow, so a quality carbon filter is not optional.

Flavor notesGarlicDieselOnionEarthy

CaryophylleneBlack pepper, spice

Adds the peppery, savory bite under the garlic.

MyrceneMusk, damp earth

Gives the low, earthy body and heavy feel.

HumuleneWoody, herbal

Rounds out the dry, hoppy edge on the exhale.

Odor control matters from week four of flower onward. Run an inline fan with a properly sized carbon filter and keep the tent under slight negative pressure.

How to grow GMO Cookies

Rated moderate. The plant grows tall and lanky in the Chem style, so the work is managing height and staying patient through a long bloom.

Indoors

Veg climate: 74-80°F, 55-65% RH
Flower climate: 68-79°F, 40-45% RH
Stretch: Expect the plant to roughly double after the flip
Light: 800-1,000 PPFD in flower (LED)
Training: Top early, then SCROG to flatten the canopy
Feeding: Medium to heavy in mid flower; taper late

Outdoors

Plant out: After last frost, nights above 50°F
Size: 6-7 ft with full sun
Harvest: Mid October
Best fit: Warm, dry autumns (USDA 8-10)
Watch for: Early frost and fall rain before it finishes
Support: Stake or trellis heavy, spear-shaped colas

Read the full indoor grow guide

GMO Cookies grows like its Chemdawg parent: tall, lanky and wide-spaced, with long internodes and spear-shaped buds that slick over with oily resin. Phenotypes tend to be consistent, which makes the plant predictable once you have run it once. The two things it asks for are vertical room and patience.

Controlling height

Flip earlier than you would for a compact indica. Plants usually finish around 4 to 5 feet indoors, and the flowering stretch can roughly double their size. Top at the fourth or fifth node, then spread the branches under a SCROG net so every top sits at the same height under the light. Supercropping any runaway stems in the first two weeks of flower keeps the canopy even.

Environment

Vegetative: 74-80°F, 55-65% relative humidity.
Flower: 68-79°F with humidity brought down to about 40-45%.
Airflow: the long bloom gives mold more time to take hold, so keep fans moving air through the canopy every day.

Light and feeding

Run roughly 800-1,000 PPFD under LED in flower. This is a hungry plant through weeks three to seven of bloom; feed medium to heavy, watch leaf tips for burn, and add cal-mag under LED. Ease off nitrogen as the buds fill.

Harvest timing

Most plants need the full 9 to 10 weeks. Pulling early is the most common mistake with this strain, since the buds look finished well before they are. Check trichomes with a loupe and wait for mostly cloudy heads with some amber for the heavy, sleepy effect it is known for.

Seed to jar in about 22 weeks

A typical indoor run with a short veg to control height. The long flower is fixed by the genetics.

Germinate1 wkSeedling2 wkVegetate4 wkFlower10 wkDry and cure5 wk

Week 1Week 22

Germinate weeks 1-1
Paper towel or plug at 75-80°F
Seedling weeks 2-3
Low light, 65-70% RH
Vegetate weeks 4-7
Top early, fill the SCROG net
Flower weeks 8-17
9-10 weeks after the flip
Dry and cure weeks 18-22
Slow dry, then jar and burp

Growing GMO Cookies outdoors in the US

Outdoors, GMO Cookies can turn into a big producer, often 6 to 7 feet tall with yields of 25 ounces or more per plant in full sun. The catch is timing. It finishes around mid October, later than most of the strains we carry, so it needs an autumn that stays warm and dry well into the month.

That makes it a natural fit for inland California, the desert Southwest and other areas with a long, rain-free fall. In shorter or wetter seasons, a greenhouse or hoop house with side vents buys the extra weeks it needs and keeps rain off the colas. Get plants in the ground soon after your last frost to give them a full season of growth; the outdoor planting guide lists dates by USDA zone.

Before you plant, confirm that home growing is allowed where you live. Rules and plant counts differ from state to state, and our state-by-state marijuana law guide is a good place to start.

Will it finish where you live?

ExcellentInland California and the Southwest

Warm, dry Octobers give the long bloom all the time it needs.

FairColorado Front Range and Utah valleys

Dry air is ideal, but mid October frosts can arrive before it ripens.

FairMidwest

Cooling nights and fall rain often land right in the final weeks.

PoorNortheast

Short, damp autumns usually end the season before a mid October finish.

FairSoutheast and Gulf Coast

The season is long enough, but humidity raises mold risk in dense buds.

Check your state's home-grow rules before you plant. Laws by state

Who GMO Cookies is for

Savory-profile fansConsumers who want garlic and fuel instead of another sweet dessert strain.
Yield chasersGrowers aiming for 1.6-2 oz per sq ft from a well-trained indoor canopy.
Tents with headroomSpaces that can handle a tall stretch, or growers ready to SCROG and supercrop.
Home breedersIts savory character passes strongly into crosses, making it a useful parent.

Keep exploring

High yield seedsStrains built for heavy harvests High THC seedsOur most potent feminized genetics How to grow marijuana indoorsTents, lights and climate control basics Yield calculatorEstimate a harvest from your canopy size How to harvest, dry and cureFinish a long bloom the right way

GMO Cookies strain data sheet

Genetics

Seed type: Feminized
Genetics: Indica-dominant hybrid
Lineage: Chemdawg x Girl Scout Cookies

Potency & profile

THC: 26-30% (supplier reported)
CBD: 0.1-1%
Commonly reported effects: Euphoric, Hungry, Relaxed, Sleepy
Flavors: Diesel, Earthy, Garlic, Onion
Dominant terpenes: Caryophyllene, Humulene, Myrcene

Growing

Flowering time: 9-10 weeks
Height: 4-5 ft indoors, 6-7 ft outdoors
Difficulty: Moderate
Climate: Warm and dry, 68-79°F, 40-45% RH in flower
Best USDA zones: 8-10 (long, dry autumns)
Outdoor harvest: Mid October

Yield

Indoor yield: 1.6-2 oz per sq ft
Outdoor yield: 25+ oz per plant

Ranges are typical for this strain and vary with phenotype, environment and technique.

GMO Cookies FAQ

Is GMO Cookies indica or sativa?

GMO Cookies is an indica-dominant hybrid. It grows taller and lankier than most indicas because of its Chemdawg side, but its effects lean heavily toward body relaxation and sleep.

How strong is GMO Cookies?

Our supplier reports THC of 26-30%, which puts it in the top potency tier. Actual results depend on phenotype, environment and harvest timing, so treat the range as typical rather than guaranteed.

How long does GMO Cookies take to flower?

Plan on 9 to 10 weeks of flowering after switching to 12/12 indoors. Outdoors in the US it usually finishes around mid October, which is later than most strains.

How much does GMO Cookies yield?

A well-trained indoor canopy can produce about 1.6 to 2 ounces per square foot. Outdoors, healthy plants in full sun can reach 25 ounces or more each in a long, dry season.

Is GMO Cookies good for beginners?

It is rated moderate. It is not fussy, but the tall stretch and long bloom ask for some planning, so it suits growers with at least one harvest behind them.

What does GMO Cookies smell and taste like?

Expect garlic, onion and diesel up front with an earthy, peppery finish. Caryophyllene, myrcene and humulene are the terpenes commonly associated with that savory profile.

Where does GMO Cookies grow best in the US?

Outdoors it does best in inland California and the Southwest, where autumns stay warm and dry into mid October. In shorter or wetter climates, grow it indoors or under a greenhouse cover.

What does GMO stand for in GMO Cookies?

The name is widely read as garlic, mushroom and onion, a description of its savory aroma. It has nothing to do with genetic modification; it is a conventional cross of Chemdawg and Girl Scout Cookies.

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