Is this nute burn?

Bandit

Active Member
Hi all,

I have read a fair bit on here and around the place, this is basically my first grow, and be fooked if i can find any other reason other then nute burn for this,, whats your opinion?


This is a clone it is 7inches high, was well rooted in rockwool cube when planted, i planted the whole cube, temps are kept at a max of 29c at canopy, about 1-1.5inch under 2x4ft cool white fluoro lights as i want to keep as mother. Right now is about 3 weeks in soil, the ph of my water is at 6.5, i have checked it with 2x calibrated digital ph meters, i flushed the soil with ph 6.5 water until run off was at 6.5 also. Am watering roughly 200-300ml every 3-4 days when seem dried out a bit. I am using a phosphoric based ph down to ph down the water before i feed.


There is also good ventilation so the only thing left i can think of is the potting mix, im from aus and using a potting mix called amgrow black label, pot and peat mixed with perlite, there is not nute details i can see on the bag except for saying nitrolsol enriched.

They are more so just going brown and dieing while curling, it started with just a few leaves at the bottom so i have been chopping them off or when they die they have fallen off now it seems to be random from the bottome leaves or mid height leaves but the top of the plan seems to look healthy.

Anyway heres the pics.

clone1.jpg

clone1a.jpg

clone1b.jpg

clone1c.jpg


Cheers
Bandit
 

Garden Knowm

The Love Doctor
hey bandit.. all you r tips look burned.. YES this is most likely over feeding..

what are you feeding them?
 

Bandit

Active Member
hi garden knowm, i havent fed anything except phed water, but i suspect the potting mix is too strong??or possibly the otherway around and it needs some nutes?? When i flushed it until the run off was also 6.5 is there a chance i was also flushing all the nutes out of the soil?? i dunno but it is going down hill pretty fast and also have some purple/redy colour to the stem.
 

papajock

Well-Known Member
looks like most of the damage is in the middle of the plant. Mag def? I would try 2 teaspoons per gal epson salt mix next watering. It wouldnt hurt the plant if I am wrong.
 

Garden Knowm

The Love Doctor
Hey Bandit,

I would transplant into a 3 gallon container, using a different soil.. and add about 20% perlite..

I don't think any soil would burn the plant that bad without adding nutrients...

I do think the plant can recover :)
cheers
 
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