Les Feuilles deviennent jaune

Either your ph pen is lying , it happened to me many times, have a habbit to recalibrate regularly. Or those girls need a bit higher ph, calcium absorbtion issues, and by chart 6.5 only starts good absobtion, to plus magnesium too. Try to raise your ph to 6.3 or 6.4. After many grows i dm in love with 6.3, was in 6.4 boat tor long too. Your end is near, i would not stress a lot, but during flush in soil, people go from growing range of 6.2-6.5 to 6.5-7.0 even, fades quicker, brings colours acording .... Kind off ;))) Happy Growing !!!

Fade happens during flower. Leaves start yellowing and falling off within the first month, so nothing to worry about. When I gets to be about two weeks before harvest, flush them by giving them just pH'ed water. You want the plant to change colors and start eating the nutrients it stored up throughout it's life so your buds won't end up being a harsh smoke. I hope this helps.

What week of flowering are you in? Don't worry too much, they look good so far, maybe a bit over-fertilized.