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Jack Herer Feminized Grow Report

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Jack Herer Feminized seeds were high on our priority list, and during this cultivation cycle, we document the important details and specific conditions used to achieve a successful harvest. Our grow report covers many unique aspects like morphology, flowering duration, and profile. In the end, we take our finished flower for THC testing too.

Flowering stage: 70 days

Total time, seed to harvest: 91 days

Final yield: 80 grams

THC content: 26.92%

Jack Herer Feminized seeds (also available in regular seeds) were created to honour a legend in cannabis history. Jack Herer is widely known as a cannabis advocate and author of The Emperor Wears No Clothes. In the 1980s, Sensi Seeds created what is known as Jack Herer by combining genetics from a Haze, Northern Lights #5, and Shiva Skunk.

Our indoor garden featured white walls to reflect and diffuse light onto the plants. We circulated air through our growing space using multiple fans strategically positioned above and below the canopy level, increasing airflow and removing unwanted stagnant air. Air was drawn into the growing area by the inline fan and pulled through a carbon filter to provide a layer of odour control.

We used a 1000W Green Power Phillips HPS light with a reflector. The light was mounted in a fixed position roughly 300 cm above the soil line. The soil of choice was BAC Lava Mix, supplemented by Bio Grow and Bio Flower nutrients throughout the different life stages of our Jack Herer Feminized. 

Environmental conditions during the grow were closely watched. Keeping your plants in the right environment helps produce the best yields possible. Temperatures were maintained at 23°C during the lights-on period and 21°C when the lights were off. 

For the vegetative period, lights were run 18 hours on / 6 hours off schedule. For the flowering cycle, lights were switched to 12/12. Our humidity levels in the grow room were steady at 65% for the vegetative period and then reduced slowly during the flowering stage.

We placed our Jack Herer Feminized seeds into pre-moistened jiffy cubes, with the pointed side of the seed facing down. Within a few days, we saw the seed hull cresting the top of our jiffy pellet. As the seed emerged from the hole, it shed the husk to reveal the bright green cotyledon leaves, supplying the young plant with roughly a week’s worth of nutrients to grow.

The Jack Herer Feminized seed was left in the jiffy pellet for a few days until we saw roots coming out of the bottom and side walls of the pellet. It was then time for us to transplant this into a 1-litre container.

To start week one, we transplanted our Jack Herer Feminized seedling into the soil. We delicately covered the long roots it had grown in the jiffy pellet, leaving the cotyledon just above the soil line. We subsequently gave our plant 100 ml of water, which was pH adjusted to a level of 6.2 and applied directly at the base of the stem, 

Infestation of plant-damaging bugs can ruin a grower’s hard work in little time. Throughout the grow cycle, we will proactively release beneficial insects to reduce the likelihood of that happening. These predators hunt and eat certain undesirable insects. This time, we dispersed a satchel of Hypoaspis Miles, which helped control fungus gnats and thrip pupae.

At the beginning of week two, we noticed the roots peaking from the drain holes in the bottom of our plant. This indicated good vigour from our Jack Herer Feminized, and we made the decision to transplant it into a larger, 5-litre container where it would remain for the remainder of the cultivation cycle. We continued to give our plant 100 ml of water applied around the base of the stem when needed. 

To help encourage a strong main stem and branches, we kept a light breeze on our seedling. This forces the cell walls to build more robust layers to sustain the wind force. Another technique we used to strengthen our Jack Herer Feminized was to turn each plant 1/2 turn each night. Not all of our plants were directly under the light, so turning them forces them to readjust to the light’s position, which also builds thicker cell walls. 

Week three recorded good vertical growth of our Jack Herer Feminized. Given the biomass above the soil, we ascertained that the root system was developing simultaneously. We added a nutrient solution to our water each time we feed the plant. The Bio Grow nutrients were combined with the water, and the EC and pH were checked before applying them to the soil. The desired EC was 1.6, and the pH remained constant at 6.2.

In a continued effort to keep unwanted critters away, we released two more types of beneficial insects. We hung sachets of Amblyseius Cucumeris and Amblyseius Californicus at the base of our Jack Herer Feminized. The first is a predator of thrip larvae, and the latter is a hunter of the dreaded two-spotted spider mite. So far, we have not seen any external pest pressure in the garden, which means our IPM program is adequate.

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