White Widow Autos (first-time grower)

Plants #1/#2: Leaf burning has stopped, so I am hopeful for a harvest, which I hope will be in two weeks. Bud growth has seemed to have stopped. I will sample a piece tomorrow to see if it has potency yet. Pistils are 50% orange, which is close to the 70% for harvest. Trichomes are 10% in small areas but not altogether. New pistils stopped appearing, and the top white pistil tips are browning. I will give them Plant Booster next feeding, which is supposed to be for the 2 weeks preceding the final flush week. Plant #3: Getting frosty up top, but leaves are yellowing. Defoliated Plant #4. Still skinny, but buds are growing. Defoliated _________________________________________________________________________________________________________________________________________________________________ I got a water sprayer, which made me wonder if I've been underwatering this while time. I got no runoff with the sprayer, but I always got runoff when I watered with a liter measurer. Perhaps I was dumping the water in too much, and the water ran off before being absorbed. I will increase watering from 0.60L to 0.75L as a result. I also got a 30x/60x/90x loupe. One pic attached.