Critical Autoflower

Critical Autoflower

A winner of many awards in Spain and loved by commercial growers around the world for its strong growth and large yields. Our Critical Autoflower was bred to be just like Critical.

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39,95 $

For 5x seeds

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Nirvana's Critical Autoflower seeds

Critical Autoflower is an extremely low maintenance, easy to grow strain that is a beast producer. Very reliable outdoors due to her high plant resistance factors. Easily one of the biggest producing autos on the market today and a solid performer.

This cultivar is Spain's most popular and productive strain and as her resin profile is prolific, making her a great strain for hash makers and extractors. Well known for her monster harvests, perfume sweet, fruity terpene profile and easy to grow nature.

She performs like no other autoflowering strain when in terms of production indoors as well as outdoors. A must-have for commercial growers and those searching for an easy to grow, low maintenance autoflowering hybrid.

Now you can grow the enormous producer, Critical as an autoflower all year long!


We crossed our best Ruderalis male with a cup winning Critical. The result is an autoflowering strain that will take 10-12 weeks from seed until harvest.

This Critical has all the confectionary sweet flavors and a high resistance to colder climates. You can expect massive yields from the photoperiod version of Critical.

We were able to create a short, low profile hybrid that is perfect for balcony grows and terraces. Now you can grow Spain’s most loved variety all year around with overly impressive results, both indoors and outdoors.


This lady will grow with a short and stocky profile that is reminiscent of indica Cannabis. A fantastic strain for growing in a Sea of Green where discretion is required.

Intermodal spacing will be small and there is no need to worry about Auto Critical stretching much once flowering commences. She will produce big and chunky buds and will become full from top to bottom with high-grade buds.


Critical Autoflower is an excellent performer in all climates, and will absolutely thrive in hot weather such as California.

From seed until harvest, most plants will be ready within 70-84 days. We advise planting this cultivar from June until the end of October for the best results.

Keep the plants South-facing also to ensure they receive the most amount of sun possible and mature with giant buds.

Fungal resistance

One of the very best things about this lady is how resistant she is to mold, meaning that you don’t need to worry as she packs on the weight during flowering. An exceptional candidate for growers who experience heavy winds and challenging climates.

Flowering time


Under HID lighting, expect plants to finish between 70-84 days, with larger producing phenotypes demanding the longest. We recommend keeping the Critical Autoflower growing for their entire lifecycle under 12 or 18 hours of lighting.


Thanks to her fast autoflowering capabilities, she can be harvested multiple times per year, meaning even first time growers can produce bountiful harvest perpetually.

Growers who live in a hot Mediterranean climate can plant from March until December. Those who experience challenging weather will get the best results when planting outdoors from June until the end of August.



For such a fast flowering auto, Critical Autoflower sure can pack on the pounds. A must-have for commercial growers as this cultivar is capable of yielding 425 g/m² (1.4 oz per square foot).


An outstanding producer outdoors, that can easily outperform most other autos on the market. Growers can expect yields of 125 grams (4.5 oz) per plant. For the biggest yields, we recommend planting into a large-sized fabric pot that is 50-100 liters (13-26 gallons).

Plant height & structure

Despite her giant harvests, her final height will be short and will measure around 90-100 cm (35-39 inches) and will produce large-sized buds that have a green and pink tint to them.


We do advise adding support when flowering starts, as the weight of the buds can become heavy. Using a net trellis, tomato cage or bamboo canes work very well.

Smell, taste, and effect

A very enticing terpene profile that is a combination of fresh flowers, savory overtones, with perfume sweet notes. Breaking open a bud will reveal a sweet but earthy aroma that has a slight tropical candy nose.

The flavor is much sweeter and candy like, meaning fans of fruity and tropical flavors will really enjoy Critical autoflowering seeds.

Her effects are upbeat, creative and very sociable. After smoking a joint, her effects are fast acting and will put you into a dreamy state that is a mixture of happy, alert and aware, as well as relaxed and chilled out.

Critical Auto can be enjoyed during all times of the day without any feelings of tiredness, and is recommended for creative individuals, artists, musicians, or those who enjoy getting stuck into a good book. This strain is also well advised for social scenarios and busy working individuals.

Buy Critical Autoflowering seeds Nirvana Shop

Massive yields, fast flowering time, high resilience to mold and a low maintenance cultivar make this lady a must-have for beginner or commercial scale farmers.

Order your Critical Autoflower seeds today at the Nirvana Shop seed bank and receive fast delivery and discreet shipping.


Genetics Critical x Ruderalis
Plant type Mostly Indica
Sex Type Female
Cultivation In & Outdoor
Climate Hot and Cold
Plant height Short
Average Yield 325 - 425 g/m²
Seed to harvest 10 - 12 weeks
Seeds per pack 5
Product Type Seeds
Seed Type Autoflower
THC High
Effect Euphoric Happy Relaxed
Flavor Flowery Fruity Sweet
Usage Depression Pain Stress
Grow Difficulty Easy
THC value 15% - 20%
CBD value 0.1% - 1%
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(148 Reviews)

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Verified Purchaser

Critical auto

Easy to grow. Highly recommend to beginners.

Verified Purchaser

one of my favs

4 out of five seeds grew. short plant with a great buzz

Verified Purchaser

mediocre buds but lots of them

had better memories about this strain... but that was a different summer...
"buds" ok for going directly into butter or other extracts so i give 3 stars

Verified Purchaser


good yield with tight buds

Verified Purchaser

Strong high, reasonable yield

This strain grows well in a hot, humid summer climate. They were quick flowering balanced with lower yields. Outdoor stealth grow in pots resulted in about 30 grams each in 9 growing weeks. They are good to grow while you wait for your fems to mature. Produces a strong, lasting high. I would purchase this strain again.