more nitrogen? nute imbalances -- help!!!

bud_boy

I have attached some photos of nutrient disorders I am experiencing in my grow room.
What happened here is that I had to go away over the weekend and though I tried my best to get everything right for my friend who was plant-sitting, some repair work now needs to take place.

some plants in the trays are fine, while others are showing what I think is a nitrogen deficiency and maybe a cal/mag and/or mb deficiency.

The girls are GDP, from clones (very small clones) I have had the plants for one month, so they are about 6 weeks old.
I'm growing in coco b'cuzz, with 30 - 40 % perlite.
I was feeding them foxfarm big grow 6-4-4, transplanted to bigger pots last week, still with foxfarm big grow 6-4-4, there was some yellowing due to transplant shock (or deficiency) I cut the yellow leaves away and put the ebb & flo trays on with the foxfarm big grow hydroponic formula which is 3-2-6 . I'm following directions: http://www.foxfarmfertilizer.com/hydrofeed.pdf for week four. I set the ph in the reservoir at 5.8, but now it is up to 6.8 -- (but that happens all the time in my system, even if there are no nutes in the reservoir and it is not turned on)
everything else is good -- lights not too close (intentionally left that way in my absence) , ventilation very good, co2 working. ebb & flow set for 2x a day.

let me know what you think from these pics.




10_31_08_ny_sf 001.jpg

10_31_08_ny_sf 021.jpg

10_31_08_ny_sf 023.jpg

Attached Images

10_31_08_ny_sf 024.jpg (46.9 KB, 11 views)

leap270

give them a flush of 6.5 ph water. seems to be a ph problem and a nut burn. how many times are you feeding them nuts. it should be every third watering. lower your nutrient program to half or 1/4 recommended dose.

__________________
Disclaimer: I do not buy, sell, cultivate, manufacture, or use any illegal substance. Any postings I make on this forum are purely for entertainment purposes. Any pictures that I may post have been created by artificial means from images gathered from the internet and other sources. Any statements made should not be considered truthful.

bud_boy

I am watering with nutes every time as I am in an ebb & flo system.
Also, some of the plants have no yellow leaves at all!?

I consulted nute chart and ph chart -- lower yellow leaves are NPK deficiency and middle yellow leaves are Mb deficiency. last time this happened to me, I cured it with addition of cal/mag + mag foliar spray as was recommended by someone in one of the stores I frequent.

also found some info on Fox Farm on another site that was an interesting read:
http://boards.cannabis.com/plant-pro...arm-nutes.html

I have to say, I hope some other people comment here. I have read many posts on different sites where someone posts pics of their plants and 99% of the responses are flush the plants. The reality is that flushing the plant is not always the answer -- especially if the plant has gotten too much water, and if the plant has a nute deficiency, flushing the plant with no nutes isn't the answer!

tokecrazy

Hey Bud Boy,You are using coco,Coco is hard to keep ph stable,for me it was.You are right the ph will rise even with plain water cause of the coco.How big of a res do you have?Some strains can tolerate higher ph & ph swings then others strains.How are you adjusting the res mix after the ph starts to rise? I use ph water with out nutr.The looks of your plants it a combination of PH and cal-mag deficiency.The Ph swing all the time will cause nutr lockout of cal and mag up the up take of other trace element.Hope that helps. Peace

__________________
Anything I may say or do is stickly for entertainment only.This is all make believe and is not To believe by me or anyone

leap270

i would foltiar feed till i got the problem fixed. i had mag and iron dificiancy problem on my plants before and i foliar feed till i got the ph problem fixed.

__________________
Disclaimer: I do not buy, sell, cultivate, manufacture, or use any illegal substance. Any postings I make on this forum are purely for entertainment purposes. Any pictures that I may post have been created by artificial means from images gathered from the internet and other sources. Any statements made should not be considered truthful.

bud_boy

yes, tokecrazy, I did figure it as a cal/mag deficiency and added more cal/mag and it really helped.
I have a 40 gallon reservoir, and I monitor the ph, but once it starts fluctuating, I don't like to add too much ph down, just a little at a time.
and yes, leap270, I also used a foliar spray of green lighting and cal mag. I usually use the spray n grow, iron/zinc a bit later in the veg stage.
How about molybdenum? Charts I've consulted say that yellowing of middle leaves is a mb (or is the abbreviation mo) deficiency. It's not easy to find that nute alone, usually it's mixed in with others.

tokecrazy

Hey bud boy,How long dose it take for the ph to start to rise from the start of a fresh res?I havent used those nutr ,I use GH 3- part.I can add alittle more or less of each N-P-K with the 3-part floral.My re's both will drift up,I change the at that time.It's about 10 days for me but has gone 16 days before a change.The GH nutr are buffer's to help keep the ph stable. Try upping your nut strenght.What is the tds in your res?Peace

__________________
Anything I may say or do is stickly for entertainment only.This is all make believe and is not To believe by me or anyone

papabeach1

ph always bonce off often with that method.. keep checking with your ph..

you got some nutes lock out by nute burns.. keep ph low will release some nutes in the plant life.. spray them with water will help them to wake up.. and work for next grow of leaves.. IMO you got enough nutes.. next time use hydton rocks.. sometime it is hard to find local..

__________________
if Ya don't mind
then it don't matter!!

Joy, Laugh and Lives!!