25-2:
Throughout the week, I'm observing two phenomena simultaneously: a portion of the upper leaves turning a lighter green and/or appearing to have a yellowish hue.
One plant has curled leaves at the top of the plant but limited to one layer of leaves. The tips are yellowed with dark spots. Due to rapid growth, the plant flew too close to the sun and burned its wings, was my assessment. In other words, light burn.
The leaves becoming lighter are located in several layers from the top to halfway down the plant. I suspect there is a deficiency and perform a slurry test. The EC is low at 0.24 and the pH is good at 6.3. The soil is still too wet to feed, which presents a dilemma: feed with the risk of wet feet or wait a bit longer with the risk that the deficiencies become more severe?
To mitigate this, I gave foliar feeding (Terra Bloom 0.5 ml per liter) by spraying the leaves without really wetting them. I did this just after the lights were out. A day later, I first flushed the plants with a few liters of water pH 6.4 and then gave them nutrients with EC 1.3 and pH 6.4: Terra Bloom (+/- 4 ml per liter), Sugar Royal (1 ml per liter), and a tiny bit of Great White and orthosilicic acid. And hung the lights back at 30 cm. It seems to be working because I see the color coming back slightly and the yellowing has at least stopped.
Furthermore, I'm keeping the day and night temperature a bit higher at about 25 degrees Celsius during the day and around 21 at night. This is to limit the humidity at night and during the day to increase the VPD to about 1.45.
At the end of the week I see the end of the stretch and standing 87 cm tall at average.
The gas is on, and ready to go full throttle to the finish!
SensiMiller
Dr. Green Thumbs Plant Wizz GPT has the day off :)
23-2:
"At week 9, our Skunk #1 Feminised plants have shown notable progress. The journey so far has been a blend of anticipation and strategic care. This week, we observed a robust growth spurt, a testament to the nurturing they've received. The balance of water, light, and nutrients has been key. Reflecting on the journey, it's clear that each decision, from the lighting schedule to the nutrient mix, played a crucial role in their current state. Their resilience and growth are not just a result of our efforts but a dance with nature itself." Dr Green Thumbs
I can concur with my artificial assistant that the ladies are looking good and the strategy worked. However, this also required constant care, monitoring, observation, discussing the state of the plants, options, and mitigation with Dr. Green Thumbs GPT, and thinking ahead. SensiMiller