Plants n deficient help please!

[Jeff]

My plants have took a turn for the worse there at week 5 I gave them just phd water at the last watering and weak grow nutes 2 times before that soon as I woke up after giveing them plain water the leaves were yellowing from the bottom up I've read a bit and it points to a n deficiency. So I've given them 3/4 strength grow and a bit of bud candy 1ml - 1 litre last nite after waiting for them to dry. Its so horrible watching them going yellow but the soils still wet! I woz planing on giving them a foliar feed of sea weed kelp at lights out tonite do you think this will benefit them? and do you think it is n deff? Your views would be much appreciated! Her"s two pics one woz yesterday and one woz today it's getting bad quick! :-s

 

[roadsidevendor1]

that's an amazing plant for 5 weeks old.
great grow!!
could you measure the soil ph and runoff
water ph ?
and what light are you using?

 

[AndyBotwin]

Agreed that pH is a likely culprit if you've been giving veg nutes and they're still showing signs of N deficiency.

 

[Jeff]

Thanks pal its about 5 and a half weeks the ph is 6.4-6-6 and the run of is the same some times a little higher. The stems r a purple aswel? I flushed it before I gave it any grow nutes because my leaf tips were pointing down and after that gave it realy low dosess probly less than 1/4 strength that's the only nutes I've given her through the whole grow. It's it just fading to yellow and I've been checking the ph carefully after adding anything? I read a few different deficiency guides and it seemed that wot i woz getting pointed towards n wot do you reckon?

 

[Jeff]

Oh and ime using a 150w hps to that 1 plant it's well ventilated and I brought a higher output bulb 17500 lumens.

 

[roadsidevendor1]

has she stopped her vertical growth?

 

[JM]

well if you flushed and then never picked back up the nute schedule that would explain it... resume full strength nutes... ph coul go down just a tad... 6.3-6.5 in soil..

heres a couple of charts...



or 3... lol... plant looks great just gotta get ya back on track thats all...

lots of other helpful links if you scroll to the top of this page an click on "cannabis infirmary" and then click on "announcements" too

 

[Red eyed c]

That is an excellent looking plant for week 5,what strain is it mate? That's a fast moving girl :smokebuds:

 

[Jeff]

Yes she it still getting slightly taller but not at the same rate as a week ago. The yellowing started the day after I gave her just water and the ph woz bang on 6.4 and run off basically the same? That's wot lead me to belive she wanted some feed.

 

[JM]

yup... she's hungry... if your ph is bang on 6.4... feed her up... and start tweakin in more flower nutes and less grow.... if you havent already begun transition...

also... do you use calmag? or some calcium and magnesium supplement?

if you dont... get some epsom salt and molasses... and 1tsp per gallon epsom every 3rd watering during flower... and 1/2 tsp molasses / gallon every third watering.....