Nitrogen Toxicity? - Trying to Diagnose

Here's some info:
What Strain is it? I don't know (bag seeds)
Is it Indica, Sativa or Hybrid? What percentages? Both, I don't know percentages
Is it in Vegetative or Flowering? Vegetative
If in Vegetative Stage.. How long? About a month
Indoor or Outdoor? Indoor
Soil Hydro? Soil
If Soil... What is in your mix? ProMix
If Soil... What size pot? 1 gallon
Size (Wattage) Of light? 8 bulb T5 (about 430watts I think)
Is it Air Cooled? No
Temperature of Room/Cabinet? About high 70's - mid 80's
RH of Room/Cabinet? About 50%
PH of medium or Reservoir? I don't know
Any pests? no
How often are you watering? Every couple days
Type and strength of fertilizers used? Biobizz full line and about 3/4 strength
Size or square footage of room? 4x4

Here's some photos

I would say just generally over fed. flush a bit and reset nutes a little lower. you look like your going to get some burn in the margins. they are young shouldn't notice when they get older.

here buddy, get this book for 32 bucks on amazon and safe your headaches for women. immobilized nutes. you locked some out. flush and start over.

brokencage said:

I would say just generally over fed. flush a bit and reset nutes a little lower. you look like your going to get some burn in the margins. they are young shouldn't notice when they get older.

Click to expand...

They don't really look over fed. Calmag issues. Maybe lockout. Possibly overwatered as well. Look healthy other than that and the new growth looks pretty healthy.


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In my experience the strains I have grown don't like 84F for sustained periods. Green Crack variant I had didn't give a shit though

Calmag 100%

Defiantly burn in the leaf margins. heat and wind damage or nute burn dose this. my 2 cents. Could be calcium but usually it would start on the leaf edge before spreading to the margins. shouldn't be calcium though. Promix uses lime in their mix and most complete nutrients have 3-5% calcium. so between the promix's base lime content + the base nute you SHOULD have enough calcium. That being said there are always pigs. whatever you do do it slowly. chose a course of action and then give it plenty of time to see if it works.before trying anything else. Thats why when Im unsure of the problem I almost always start with a light flush of plain water. if that don't help you KNOW for sure it is a deficiency. They look well otherwise tho and at that age 3/4 strength every couple days seems a little high in soil.

PS. Whats your run off PH? this is often not an accurate measure in soil or coco but if it is way off it may give you something to work with.

It's a magnesium problem 100 % I'm not guessing I'm just telling you the solution the twisting of young leaf tips and those streaks in the leafs i just fixed 50 plants with this problem, and it's caused from one of 4 things, 1. most ppl dismiss this but it could be rootbound, the plant isn't getting the proper amount of nutrients because they're is not enough soil for the roots to latch onto anymore. 2. The soil simply needs more mag the plant already used up what was available originally, 3. The beginning of a nutrient lockout, too much nutes clogging her up, usually too much n during veg for beginners 4. A bad ph, usually you'll either lock out your micro nutes or your npk depending if ph is high or low. Looking at how they look completely healthy I'd say add cal mag but check the ph just incase, if it's a little high over 6.8, possibly locking out micronutrients but I doubt it just looking at em. Also, if they were heat stressed, leafs would curl forming a cup somewhat and also the moisture in the leaves evaporate and make it so it can't handle as much light causing bleaching usually heat and light intensity go hand in hand while also your plant goes through so much more water you would def notice.

I would say let them dry out a bit then fluh with very diluted nute solution and give an epsom salt/ iron chelate foliar spray.

Are you using tap water or RO?
Back off the nutes and flush em out then let them dry out between waterings.