Bottom leaves yellowing over last three days. Day 15 of flower.

Hey, buddy! 👋 Don't worry, bro! Yeah, it's a slight nitrogen deficiency, but at your girl's age, it's totally normal, bro! Yellowing, dying, and dropping leaves on the lower levels is a common occurrence for her age! 👌 You did the right thing with NPK-1-1-2 👆 But your soil pH isn't quite right, I recommend adjusting it to 6.3 pH for your soil so the plant can successfully absorb all the necessary elements! 👆 Good luck, buddy!

I'd say Mr Weed's has this one nailed down, It's a starter 3 leaf.. It's normal for them to die off.. I don't see any phosphorus deficiency's on your plant just the yellowing starter leaves..

Your autoflower may just need a small flush if you're using a hotter soil mixture. Just into your blooming phase shouldn't have much yellowing. Or checking out her runoff's PH could help you out as well. All the best & grow strong pal' 🥂

Hey Buddy, Yes that’s the nitrogen deficiency and also I can see some other deficiencies like phosphorus deficiency.You should start using blooming nutes.You can you 1-1-2 with high dosage around 400-700 ppm.But don’t forget to change nute or reduce nitrogen supplement later.Plants don’t use much nitrogen in the flowering stage.