Plants are doing crazy things. Help!

Started from seed Ive been using bottled water untill recently also I never PH'd water untill about a week ago they are on day 40 today. Three transplants now in a 3 Gallon with new medium Sunshine Mix 4 with about 1/2 a cup of worm castings per container before they were in walmart enriched cheap soil. I got a 600 MH in a 4x4 tent with a good fan and air flaps open on bottom of the tent. The light is air cooled and well above plants (1.5-2') I have a two part nutrient mix which I was feeding them the recommended amount every water which was about every 2-3 days. That went on for about 4-5 waters untill I realized Im over feeding them. Now I cut back to every 2nd or 3rd water at half strength as well I did leech soil after the over nuting period. The Problem is the leafs are showing signs of either nute burn or ? leafs have brown dry spots which are cracking, tips are dying on some, the stems are sagging, some leafs are curling down at the tips and some up on the sides. Some main stems are purple and they seem to be growing slow although this is my first grow so I dont know. Please look at pics and let me know what you think.Also should I be thinking about scraping them and starting with new seeds or flower them now?

Temp 80 humidity 70-80 day 50-60 night also have ordered an inline fan cf combo which im waiting for once installed plan on flowering.

yea looks like nute burn. u shood flush insted of jus leechin. feedin everytime u water is overkill. the parts on the plant that is alrdy damage cannot b fixed but ur new growth looks healthy and overall the plant doesnt look bad. the plant in the 2nd pix looks like heat stress the way its cuppin upwards. i wood flush and chill out wit the nutes for bout a week or 2

jsesh said:

hey man look like a light problem oor and underwattering how dry is that soil?

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I agree... or even overwatering? A few of the stains on the leaves could be from watering with the ferts. Sometimes you dont realize dripping some of the solution on your leaves. This is what usually happens. One of the pictures shows curled leaves on top,.. That almost looks like the light is drying up the leaves... too close?

How old is the lamp ur using? Did u buy it new or get it used?

The light is brand new, The cuping upward forth pic is the smallest plant and 2'2"from the light, The soil moist right now. As for flushing they were repotted very recently and only recieved half nuts since its a new mix I though they could use a little although Ill water them without nutes for the next two waterings.

nute burn too much moisture heldin and the curling leaves upward are a heat stress sign...

Thank you guys I guess I will stop feeding them untill I flower which will be in two weeks if there still alive as for moisture I dont know what to do maybe my inline fan will help once i get it and heat stress its 80 in there the lights pretty high I guess ill try raising it although it is 2' above and air cooled. Also should I prune off the dying fan leaves and lower branches which are touching soil and pot rim?

if its more then 50% of the leaf thats damage then id go ahed and cut it, but if not jus cut the parts thats dead off and leave the rest

tonymontana187 said:

Thank you guys I guess I will stop feeding them untill I flower which will be in two weeks if there still alive as for moisture I dont know what to do maybe my inline fan will help once i get it and heat stress its 80 in there the lights pretty high I guess ill try raising it although it is 2' above and air cooled. Also should I prune off the dying fan leaves and lower branches which are touching soil and pot rim?

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80 is not a bad temp, and if your lights are air cooled, you can keep em about a foot away to be on the safe side. Imho,.. I always remove the worn out leaves .. Its like cancer to leave em on.