The most common yellow leave will be found on the terminal stage of flower because plant will power up for flower produce rather leave grown. Leaves are most of the time a reservoir of H2O nutrients and minerals.
Yellow leaves can apear on you plant at some point of grow?
Short answer: yes, yellowing can appear on your leaves at any point of your growth, be it vegetative stage or flower stage.
It always means that something is wrong and and can have many reasons; if you take the time to really analyze the symptoms you can tell what's going wrong.
Looking at your photos it seems that the Auto Sweet skunk is the most affected and that the yellowing is at the top of newer growth, not the older foliage, so it's not Nitrogen deficiency. You might have not noticed, but along with the top leaves been yellow they also have really thin blades. I believe what you are seeing is an excess of P-K, both excesses of phosphorous and/or potassium will make the newer leaves turn yellow and develop really thin blades; also they will cause several lockouts like calcium, magnesium, iron and zinc.
I would measure the strength of your feeding (EC/PPM) and dial back or stop altogether with the PK13/14
Good luck bro, i wish you best of luck! thoose seedlings are 16 days old but your diary starts from week 1 maybe you may want fix it for better day by day reports. Good luck till harvest! 👍
Congrats brother. Thoose are very dense heavy buds i believe. i ll be looking forward your harvest weight update and wish you best of luck brother. Great work👊
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