Day 31: 2L (PH6.3) with 1ml/L PK13-14
She's definitely well on her way to stretch, and some of the bud sites are already showing signs of consolidation and an increase of mass, not so much as to call it stacking or bulking, but a great early flower nonetheless.
To aid with bud forming, I've started mixing in some flower nutes. I'm starting at half dose and will probably follow up with a regular watering later this week.
Additionally, after taking the pictures, I removed the upper fan leaves of the main cola and the next highest too since it was outpacing the others. I'm trying to not agitate her too much to prevent stunting.
Since she's grown so much, the main cola was receiving 900 PPFD, and the lowest canopy budsite - in the front on the pictures - was receiving about 450 PPFD. Hence, I raised the light up to 30cm above the main cola. I haven't remeasured the PPFD afterwards.
Day 34: 2L (6.5PH) + 0.5mL/L CalMag
Day 36: 2L (6.3PH)
Discovered two her companion plants fostering an army of spider mites so I removed all of the companion plants. The citrus had to move out of the tent for a more natural day night cycle anyway, so that one will reside on the window sill for a few days. The affected pepper plants have received spider mite treatment and are currently outside until they recover.
I'll have to keep an eye out for any webbing on the Northern Light, although I think that the infestation wasn't too bad. Additionally, today was the planned defoliation day so I lollipopped her. Watering is a lot easier now and I hope the lollipop will not be detrimental to her overall yield - it hurt when I removed some branches I'd otherwise keep.
And that about sums up week 4, this week was all about the stretch and the lollipop. She received her first flower nutes and immediately told me she did not need them. She became a bit thirstier and is well on her way to become the biggest yielder I've grown!