CBD Critical Mass feminized cannabis plant with heavy, dense flower clusters

Feminized seeds

Critical Mass AfghanixSkunk #1xCBD-rich line

THC: 5-7%
Bloom: 7-8 wks
Yield/sq ft: 1.6-2 oz
Level: Moderate

CBD Critical Mass Feminized Seeds

From $65.00

Earthy sweetness with a skunky, citrus edge. A high-CBD, indica-dominant take on Critical Mass that keeps THC low and finishes in just 7-8 weeks.

THC5-7%
Bloom7-8 weeks
Height3-4 ft indoors
LevelModerate

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SKU: BMS-CBDCM-FEM Categories: CBD Seeds, Fast Flowering Seeds, Feminized Seeds, High Yield Seeds, Indica Seeds, Indoor Seeds

Quick answerCBD Critical Mass is a high-CBD, low-THC, indica-dominant hybrid built on Critical Mass (Afghani x Skunk #1) crossed with a CBD-rich line. It is known for reported CBD around 7-10% with THC around 5-7%, an earthy, sweet and skunky aroma, heavy colas and a fast 7-8 week flowering time indoors.

CBD Critical Mass at a glance

CBD7-10%Supplier reported. CBD, not THC, is the headline here.

THC5-7%Supplier reported. Low by modern standards

Flowering7-8 wksFrom the switch to 12/12

Indoor yield1.6-2 ozPer sq ft, dialed-in setup

Height3-4 ftIndoors. 5-8 ft outdoors

THC to CBD ratioRoughly 1:1 to 1:2A mild, clear-headed profile for people who want less intensity

What is the CBD Critical Mass strain?

CBD Critical Mass takes one of the heaviest-yielding indica lines around and shifts its chemistry toward CBD. The base is Critical Mass, a classic Afghani x Skunk #1 cross known for colas so big they can bend or even snap their own branches. Crossing it with a CBD-rich line keeps that size and speed while moving the balance away from THC.

The result is a CBD strain with a reported 7-10% CBD and 5-7% THC, roughly a 1:1 to 1:2 THC to CBD balance. That makes it a very different experience from the high-THC strains that fill most menus. Consumers often describe it as mild, calm and clear-headed, and it is popular with people who want something far less intense.

In the garden it still behaves like Critical Mass. Expect a compact, bushy indica frame, fat colas and a fast 7-8 week bloom. These feminized seeds are bred to produce female plants, so every seed you germinate is aimed at flower, not pollen.

AfghaniSkunk #1

Afghani x Skunk #1CBD-rich line

CBD Critical Mass

How it feels

Consumers often describe a mild, mellow experience: a relaxed, settled body with a mind that stays clear and focused. With low THC, it suits people who want far less intensity than a typical modern strain.

First 15 minutesSoft start
A gentle, easygoing shift rather than a fast or heady rush.
30 to 60 minutesCalm and clear
Many people report feeling relaxed while staying alert and focused.
2 to 3 hoursEasy taper
Most people describe a smooth, gradual fade with little fog.

Commonly reportedRelaxedCalmClear-headedFocused

Reported THC is 5-7%, so this strain is far milder than most, but it is not THC-free and can still be intoxicating. Commonly reported downsides include dry mouth and dry eyes. These are general consumer reports, and everyone responds differently.

Aroma, flavor and terpenes

Earthy and sweet at the core, with a classic skunky funk and a light citrus lift on the finish. It is not as loud as a dessert strain, but late flower still calls for a carbon filter.

Flavor notesEarthySweetSkunkCitrus

MyrceneEarth, musk

Anchors the earthy, sweet base from the Afghani side.

CaryophyllenePepper, spice

Adds a warm, spicy depth under the skunk.

PinenePine, fresh resin

Brings a crisp, clean note to the finish.

Dry slowly at about 60°F and 60% humidity. Dense colas take longer to dry, so do not rush them into jars, then cure for at least two weeks.

How to grow CBD Critical Mass

Rated moderate. It is fast, compact and very productive; the work is supporting its heavy colas and keeping late-flower humidity low enough for dense buds.

Indoors

Veg climate: 75-82°F, 55-65% RH
Flower climate: 68-78°F, 40-50% RH
Late flower: RH 40-45% to protect colas
Light: 800-1,000 PPFD in flower (LED)
Support: Trellis net or stakes before flower
Training: Top once, then LST

Outdoors

Plant out: After last frost, nights above 50°F
Size: 5-8 ft with full sun
Harvest: Late Sept to early Oct
Best fit: Dry late summers (USDA 6-10)
Watch for: Bud rot in humid or rainy spells
Protect: Stake every main branch early

Read the full indoor grow guide

Indoors, CBD Critical Mass stays manageable at about 3 to 4 feet, which suits a 3×3 or 4×4 ft tent. It is rated moderate: the plant grows easily, but its Critical Mass heritage means very heavy colas that need support and dry air.

Support the colas

Set up a trellis net or individual stakes before flower, not after branches start to sag. In the last few weeks, top colas can get heavy enough to bend or snap their branches, especially right after watering. A SCROG net works as both a training tool and a support.

Environment

Vegetative: 75-82°F days, 55-65% relative humidity.
Flower: 68-78°F, 40-50% RH, dropping to about 40-45% in the final two weeks to protect dense buds from bud rot.
Airflow: oscillating fans above and below the canopy, plus an exhaust fan with a carbon filter.

Light and training

Aim for roughly 600-800 PPFD in late veg and 800-1,000 PPFD in flower under LED. Top once, then spread the branches with low-stress training so light reaches more bud sites and the weight is shared across more tops. A light defoliation around week three of flower opens up airflow through the middle of the plant.

Harvest timing

Most plants finish 7 to 8 weeks after you switch to 12/12. Judge ripeness by trichomes rather than the calendar, and check deep inside the biggest colas for gray or brown spots before you chop.

Seed to jar in about 21 weeks

A typical indoor run. Veg length is up to you; the fast 7-8 week bloom keeps the total short.

Germinate1 wkSeedling2 wkVegetate5 wkFlower8 wkDry and cure5 wk

Week 1Week 21

Germinate weeks 1-1
Paper towel at 75-80°F
Seedling weeks 2-3
Gentle light, 65-70% RH
Vegetate weeks 4-8
Top once, start LST
Flower weeks 9-16
7-8 weeks after the flip
Dry and cure weeks 17-21
60°F, 60% RH, then jars

Growing CBD Critical Mass outdoors in the US

Outdoors, CBD Critical Mass grows into a broad, heavy plant of about 5 to 8 feet and finishes between late September and early October. That early finish is a real advantage across much of the country, since it beats the first hard frost in most areas. Plant out after your last spring frost, once nights stay above about 50°F.

The challenge is moisture. Its dense colas hold water after rain or heavy dew, and late-summer humidity can lead to mold in the final weeks. Stake every main branch early, thin the interior for airflow, and harvest a few days early if a long wet spell is in the forecast. Our outdoor planting guide has dates for every USDA zone.

Always check your local rules first. Home cultivation is legal for adults in some states and not in others, and plant limits vary by state. Low THC does not change that, so the same rules apply as for any other cannabis plant.

Will it finish where you live?

ExcellentInland California and the Southwest

Dry late summers keep its dense colas clean through a late September finish.

GoodColorado Front Range and Utah valleys

The early finish beats most frosts; stake plants against wind and afternoon storms.

GoodMidwest

It finishes before the cold, wet weeks, but humid August nights need watching.

FairNortheast

Damp late summers raise bud rot risk in dense colas. Prioritize airflow.

PoorSoutheast and Gulf Coast

Peak heat and humidity arrive just as the colas fill out, so indoors is safer.

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

Who CBD Critical Mass is for

Low-intensity seekersAdults who want a mild, clear-headed strain instead of a high-THC experience.
Growers short on timeA 7-8 week bloom gets you from flip to harvest faster than most strains.
Tent growersA compact 3-4 ft frame that fits standard 3×3 and 4×4 ft tents.
Yield-focused gardenersCritical Mass genetics deliver heavy colas when you give them solid support.

Keep exploring

CBD seedsMore high-CBD, low-THC genetics Fast flowering seedsQuicker harvests from the flip What is a CBD strain?How CBD-dominant cultivars differ Bud rot explainedProtect dense colas late in flower How to germinate seedsGet every seed off to a clean start

CBD Critical Mass strain data sheet

Genetics

Seed type: Feminized
Genetics: Indica-dominant hybrid (about 80% indica), high-CBD line
Lineage: Critical Mass (Afghani x Skunk #1) x CBD-rich line

Potency & profile

THC: 5-7% (supplier reported)
CBD: 7-10% (supplier reported)
Commonly reported effects: Calm, Clear-headed, Focused, Relaxed
Flavors: Citrus, Earthy, Skunk, Sweet
Dominant terpenes: Caryophyllene, Myrcene, Pinene

Growing

Flowering time: 7-8 weeks
Height: 3-4 ft indoors, 5-8 ft outdoors
Difficulty: Moderate
Climate: Temperate to warm and dry, 68-78°F, 40-45% RH in late flower
Best USDA zones: 6-10 (best where September is dry)
Outdoor harvest: Late September to early October

Yield

Indoor yield: 1.6-2 oz per sq ft
Outdoor yield: 21-28 oz per plant

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

CBD Critical Mass FAQ

Is CBD Critical Mass indica or sativa?

CBD Critical Mass is an indica-dominant hybrid, usually described as about 80% indica. It grows short and bushy with heavy colas, and its effects are commonly described as calm and relaxed while staying clear-headed.

How much CBD and THC does CBD Critical Mass have?

Our supplier reports CBD around 7-10% and THC around 5-7%, roughly a 1:1 to 1:2 THC to CBD ratio. Exact levels vary by phenotype, grow conditions and harvest timing, so read these as typical ranges rather than guarantees.

How long does CBD Critical Mass take to flower?

Most plants finish 7 to 8 weeks after switching to a 12/12 light schedule indoors. Outdoors in the US, expect a harvest from late September to early October.

How much does CBD Critical Mass yield?

Indoors, a dialed-in setup can produce roughly 1.6 to 2 ounces per square foot. Outdoors, vigorous plants in full sun can produce roughly 21 to 28 ounces each, as long as the heavy branches are supported.

Is CBD Critical Mass good for beginners?

It is rated moderate. The plant grows easily and finishes fast, but its heavy colas need stakes or a trellis, and late-flower humidity should stay around 40-45% to prevent bud rot.

What does CBD Critical Mass smell and taste like?

Earthy and sweet with a skunky backbone and a light citrus finish. Myrcene, caryophyllene and pinene are the terpenes most often reported.

Where does CBD Critical Mass grow best outdoors in the US?

It does best in dry late-summer climates such as inland California, the Southwest and the Colorado Front Range, where a late September to early October finish beats both frost and fall rain. In the humid Southeast and Gulf Coast, dense colas face heavy mold pressure, so growing indoors is the safer choice.

Will CBD Critical Mass get you high?

It can, just much less than most strains. With reported THC around 5-7%, it is not THC-free, but consumers often describe the effect as mild, calm and clear-headed. Start with a small amount and see how it feels for you.

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