Please help me identify this problem

Stonez14

Active Member
Hello, although this is my first post i have been watching reading and studying this forum for sometime before even making an account myself. Unfortunatly my first post is a negative one im having a right game making my plants healthy. Ive tried to the best of my ability to sort it out myself and after no luck whatso ever i need your help... Anyway here my story.

Right so im growing in coco using the standard canna nutes a and b, got them in 56l rhizo pots. Temp is 27 degree's pretty constantly lights on and the lowest the temps ever been lights off is 17 degree's my ventalation system is fantastic they have a very good cold air supply im doing 8 under 2 600w's.

At first while in baby pots i was feeding them 1ml per litre of nutes every 2/3 days NOT monitoring the ph at this point as i didnt even know about it they were having 3/4 litre each? When they started going a light green colour and got a bit yellow brown around the tips of the leaves (burnt?) so i started giving them just water and at around this point i put them into the rhizo pots and found out about ph levels. So after giving them water for 5 days or so it didnt seem to stop i so got some cal - mag and started giving them .5ml per litre of that...

They seemed to clear up so i thought great ill gives them nutes on alternate feeds from now on so thought id ween them onto it again now i was putting 1ml per litre of nutes .5 calmag and ph at 5.8 after 4 days boom all the bloody burning was back again?!?! Devastated would be an understatement so i thought right im going to try and start from scratch and ive them ONLY water at 5.8ph i did this for 7 days they prob got watered three times in this period only water... Which brings me to 2 days ago very pale leaves not yellow but a very very light green yellow spots appearing all over the leaves which some have now devolped into holes, on new growth the edges are all a burnt yellow colour and light green spots which look like the early stages of the yellow spots over the leaves tips of half the leaves are curling up and yellow burning.

I have friends who know the basics of growing and throught i have ran my plans by them giving them the symptoms at the time and we all belive at the time i was doing the right thing, wether i have explained it well or not and done the wrong thing (which i guess i have!) you will be the judge of.

I have tried my absolute hardest to resolve this myself but theres nothing else i can think of any help will be greatly apprecited i will put pictures up
Tomorow as i am unable to today.
 
If I was you I'd try a good soil next time and keep away from the nutes as much as possible. Much easier to manage. I'm not a coco grower so can only presume you've fried them on nutes. Less is more, suggest good flush with h202 and start afresh with a much reduced feeding schedule, lot les nutes. How old are they now?
 
5 weeks in veg today im also supper cropping them there about 14 inches

edit: i have also checked for spidermites the plants are 100% bug free and been sprayed with plant vitality plus
 
image.jpgI have tried to
get you a quick picture im really really
sorry the hps is on but untill tomorrow theres nothing else i can do
 
Nutes take time to work through the plants, did you flush?, they will still be feeding off the nutes already in the system so it will take time to sort itself out. Once you go wrong it can take a while to put it right, be patient and put up some better pics of the whole plant so we can see where she's at. If you do feed use a very very light feed to start & see how she reacts.
 
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