Pure AK Grow Report by Female Seeds

flowers growing

Pure AK grow diary from germination to harvest

Hey there and welcome (back) to Free the Tree
For today’s article we are sharing a grow report of the Pure AK strain was shared by Female Seeds, a Dutch seed bank that specifies in quality female seeds. Within a couple minutes you will see the whole development of this beautiful plant.
For each step you will also get the feeding schedule, if you’re about to grow this strain this can be useful for you!
Let’s get started 

Pure AK – Strain and Grow info

Grow details

  • Strain : Pure AK feminized
  • Grower : Jacek from Female Seeds
  • Vegetation length : 6 weeks
  • Flowering length : 9 weeks
  • Grow Medium: Soil
  • Nutrients used : Plagron Growmix, Atami
  • Vegetation lights : 400W HDI
  • Flowering lights : 400W HDI
  • Grow techniques used :  LST, HST, Topping, FiMing

Pure AK Strain information

  • Lineage :  AK x Skunk Special
  • Seed type : Feminized
  • Seed Bank Female Seeds
  • Flowering length : 7 to 8 weeks
  • Taste : Earth & spicy
  • Smell : Blackberry & raspberry
  • High/Effectpulsating head high with a Indica, bodystone effect
  • Height : Indoor – 60-90cm
  • Yield : Indoor – 500-600g/m²

Week 1 – Seedling stage

1st week of the vegetation stage

  • Light Schedule: 18 hours
  • Temperature Day: 29 °C
  • Temperature Night: 18 °C
  • Air Humidity: 39%
  • Pot Size: 14l
  • Watering Volume (liter/plant/24hour): 0.19l
  • Nutrients: Ata Rootbastic – 0.1 ml/l
Cotyledons and first stage of pure ak growing

Pure AK seedling stage

Week 2 – Topping

2nd week of the vegetation stage

HST (High Stress Training) was performed at the beginning of the week, here are the effects after 7 days. The plants are healthy, they are good after the first training. Everything looks very nice.

  • Light Schedule: 18 hours
  • Temperature Day: 29 °C
  • Temperature Night: 17 °C
  • Air Humidity: 44%
  • Pot Size: 14l
  • Watering Volume (liter/plant/24hour): 0.45l
7 days after topping

7days after topping

Week 3 – Low Stress Training & High Stress Training

3rd week of the vegetation stage

During the 3rd week Low Stress Training & High Stress Training was continued as she reacted well during the 2nd week.

  • Light Schedule: 18 hours
  • Temperature Day: 28 °C
  • Temperature Night: 16 °C
  • Air Humidity: 39%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 0.57L
  • Nutrients : Plagron : 0.2ml/L pH min and 1ml/L of pure zyme.
    0.2ml/L of Ata Rootbastic was also added.
low stress training to develop multiple apex's

LST – Tying the branches horizontally

Week 4 – LST & HST

4th week of the vegetation stage

During the 3rd week Low Stress Training & High Stress Training was continued as she reacted well during the 2nd week.

  • Light Schedule: 18 hours
  • Temperature Day: 27 °C
  • Temperature Night: 16 °C
  • Air Humidity: 38%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 0.76L
  • Nutrients : Plagron : 0.2ml/L pH min, 1ml/L of pure zyme and 5ml/L of terra grow.
    0.2ml/L of Ata Rootbastic was also added.

LST – Branches tied to guide growth

Foliage of month old Pure AK plants

Week 5 – Pre-flowering

1st week preflowering

  • Light Schedule: 18 hours
  • Temperature Day: 28 °C
  • Temperature Night: 16 °C
  • Air Humidity: 33%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.14L
  • Nutrients : Plagron : 0.2ml/L pH min, 1ml/L of pure zyme and 5ml/L of terra grow.
    0.2ml/L of Ata Rootbastic was also added.

Pure AK before flowering stage

Week 7 – Early flowering

2nd week of the flowering stage

  • Light Schedule: 12 hours 
  • Temperature Day: 29 °C
  • Temperature Night: 18 °C
  • Air Humidity: 38%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.14L
  • Nutrients : Plagron : 0.2ml/L pH min, 1ml/L of pure zyme and 5ml/L of terra grow.
    0.2ml/L of Ata Rootbastic was also added.

Pure AK forming budlets

Apex buds developing

Week 8 – Flowering

4th week of the flowering stage

During the 3rd week Low Stress Training & High Stress Training was continued as she reacted well during the 2nd week.

  • Light Schedule: 12 hours
  • Temperature Day: 30 °C
  • Temperature Night: 19 °C
  • Air Humidity: 25%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : Plagron : 0.2ml/L pH min, 1ml/L of pure zyme and 5ml/L of terra grow.
    0.2ml/L of Ata Rootbastic was also added.
flowers growing

Start of week – flowerings developing

think stem to support flowering

Thick stem supporting system

think flowers growing

End of the week, flowers thickened nicely

Week 9 – Flowering

5th week of the flowering stage

  • Light Schedule: 12 hours
  • Temperature Day: 31 °C
  • Temperature Night: 20 °C
  • Air Humidity: 20%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : Plagron : 0.6ml/L pH min, 6ml/L terrabloom, 1ml/L green sensation
view of many ak pure plants flowering

Tent full of flowers

one pure ak plant up close

Close up on one plant

apex bud growing

Apex flower developing

Week 10 – Flowering

6th week of the flowering stage

  • Light Schedule: 12 hours
  • Temperature Day: 30 °C
  • Temperature Night: 18 °C
  • Air Humidity: 18%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : Plagron : 0.6ml/L pH min, 7ml/L terrabloom, 1ml/L green sensation
3 pure AK flowers

3 Pure AK flowers

full grow room of flowers

Grow room during 6th week of flowering

Week 11 – End of Flowering and Flush

7th week of the flowering stage

  • Light Schedule: 12 hours
  • Temperature Day: 30 °C
  • Temperature Night: 18 °C
  • Air Humidity: 18%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : Plagron : 0.6ml/L pH min, 7ml/L terrabloom, 1ml/L green sensation
close up on pure ak flower close to harvest

3 Pure AK flowers

pistils drying up and turning orange/red

Grow room during 6th week of flowering

Week 12 – Flushing

8th week of the flowering stage

  • Light Schedule: 12 hours
  • Temperature Day: 30 °C
  • Temperature Night: 18 °C
  • Air Humidity: 18%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : none
deficiencies showing due to the flush

Bud while flushing

Week 9 – End of flowering & harvest

8th week of the flowering stage

  • Light Schedule: 12 hours
  • Temperature Day: 31 °C
  • Temperature Night: 20 °C
  • Air Humidity: 20%
  • Pot Size: 14L
  • Watering Volume (liter/plant/24hour): 1.89L
  • Nutrients : Plagron : 0.6ml/L pH min, 6ml/L terrabloom, 1ml/L green sensation
pure ak Flowers ready to be harvested

Pure AK flowers nearing harvest

2 flowers at the end of the flushing phase

Close up on flower

harvested pure AK buds

Harvested Pure AK Flower

About the grower

This grow report was shared by Female seeds, a Dutch seed back founded in 2003 by Ferry, the main breeder and founder, who started making regular seeds during his study, as a source of extra income already in the late 80s. It soon became a massive seeds production business for cannabis seed banks throughout the 90s.
Learn more about them over here!

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