Leaves still won't stop browning

This has been happening for awhile and I assumed it'd stop once I started nutes (FF grow big) and transplanted to a nice big pot (it's been like 4 days since the transplant from the little party cup) but it hasn't stopped. I started nutes like a week and a half ago and have been through I think 2 or 3 waterings steadily increasing the concentration. I'm almost to the suggested average feeding of 2-3 teaspoons per gallon. I keep the pH at like 6.5 to 6.8 always. Under 400W HPS for 19 hours a day. temp usually in mid 80s during light and drops to 70 during dark. The plant grows fine but it always slowly loses old leaves to the same symptoms. The tip browns and then the leaf slowly turns yellow and then dies and falls off. What is up? Is it just because the roots haven't grown out yet into the new dirt or is it a def. or what? These pictures are from the bottom to the top







Also when should I start flowering? It's probably like 10" tall and it's White Widow.

you only want to give them nutes once a week and thats at the most----plants are showing signs of nutrient bur

your temp is good--i would change the nutes and the light hours--16 on and 8 off in veg.stage ---dilute the nutes in a lot more water or just quite using them all together

lay off the nutes. when you took it from the cup you put it in fresh soil right? its very possible your original problem was lack of nute and in trying to fix the problem you went to far to the other side. Badly. You dont feed every watering and you need to start small and work your way up. i start at about 25%-50% strength of what it says on the bottle and slowly increase it as time goes by. always watch your plants reactions, do you see how dark green the leaves are? thats the plant telling you it has all the nutes it can handle and adding more will cause nuteburn.

I'm about to water tomorrow with straight water and just keep an alternating nute/plain schedule. I started at half a teaspoon per gallon and then waited like 4 days then went to 1 teaspoon per gallon and just watered with 1.5 teaspoons per gallon like 4 days ago and I'm about to use plain for tomorrow's watering. The recommended is 2-3 teaspoons per gallon for normal feeding.

I do see how green the leaves are but why does it still have the same symptoms it has always had? And the leaves aren't staying green (shown in the first picture). Also the tips turn brown and necrotic... I thought nute burn turned the leaves yellow on the edges

bump..............

too much nitrogen. Pe@ce.

Second that. Clean water next time or two

looks like a major nutrient burn. cut down on your nutes and you should be fine