Critical XXL cannabis seeds by Herbies Seeds


This potent Indica-dominant photoperiod strain with a citrus fragrance is ideal for deep relaxation in the evening after a long day at work. Harnessing truly critical THC levels of up to 27%, cannabis lovers will adore its refreshingly strong and long-lasting effects.

Technical details

  • Breeder: Herbies Seeds
  • Genotype: 65% Indica / 35% Sativa
  • Dominant terpene: Myrcene
  • Genetic lineage: Skunk #1 x Afghani x Critical Mass
  • Medicinal use: Stress, anxiety, depression, insomnia


Critical XXL represents a new touch on the famous Critical genetics. Meticulously bred in Spain by Herbies Seeds, this 35% Sativa/65% Indica hybrid delivers a supreme high and offers exceptional yields that will make countless growers very, very satisfied.


This strain’s lineage includes the all-time classic Skunk #1 as well as Afghani and Critical Mass genes, which are responsible for its potency and massive yields. Skunk #1 is known for its heavy, stoney-headed high coupled with deep body relaxation. Make no mistake: these legendary traits manifest themselves in Critical XXL, too.

Flowering Time

You can plant your Critical XXL seeds outside and inside, but we recommend growing indoors. In this case, you can expect a flowering time of 50 to 55 days.


If you’re growing indoors, you can expect higher than average yields of 500-600 grams per square meter (1.6-2 oz/ft²) and 1300-1600 grams (46-56 oz) per plant outdoors.


Critical XXL is very powerful and is best suited for nighttime smoking, although you can use it for quiet relaxation earlier in the day. Due to its high THC content and practically no CBD, this strain delivers a deep and peaceful body high with mostly Indica effects.

THC Levels

The potency of Critical XXL’s high is a stand-out feature due to the exceptionally high THC levels ranging from 24 to 27%.

Smell and Taste

Critical XXL sports a strong spicy smell with lemon notes, so you’ll be sure to have some delicious smoke sessions! This strain’s terpene profile is dominated by myrcene – one of the most common terpenes found in cannabis – that gives weed an earthy scent and taste.

Grow Tips

This strain thrives in any environment, but you might want to give her ample space since she’ll reach a medium height. Indoor-grown plants can reach from 100 to 120 cm (3’2-3’9), while outdoors, they can grow to 120-150 cm (3’9-4’9) in height. Critical XXL will impress cannabis enthusiasts because with this girl, you’ll get solid frost-covered buds in a very short time.

  • Critical XXL enjoys an 18/6 light schedule while in veg. When she’s ready to flower, switch her to a 12/12 schedule.
  • Start your seeds in at least 10-liter pots to give the roots enough space for growth.
  • The plants could do with topping and SoG to maximize their already generous yields.


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