Plants started yellowing about 2 and half weeks into flower.

C

Cesaro

Well-Known Member
So I'm using Botanicare Pro Blend Bloom, Cal Mag. Hydroplex, and Liquid Karma. I'm using about 50 % strength.

They were looking good for about 2 weeks then this started happening to the bigger plants, I started introducing CO2 pretty heavily, so I'm thinking I just didn't add enough cal-mag. I think it's Mag, I have started to foliar feed with epsom, about 1/2 tsp per qt.

I lurk these forums often, and have learned much from them, so I'm hoping some more experienced people can chime in :)

Thanks!

Edit: Ooops, PH was 5.8-6.1 EC was .8-1.0
 

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That is a Nitrogen defficiancy which is common in flowering plants, since your feeding the plant very little N, its using the N out of the lower leaves. Yopu could feed a very low amount of N or just leave it be, its quite common.
 
ak.fortyseven said:
That is a Nitrogen defficiancy which is common in flowering plants, since your feeding the plant very little N, its using the N out of the lower leaves. Yopu could feed a very low amount of N or just leave it be, its quite common.
Click to expand...

Interesting, this problem happened once I had been doing CO2 for about 3 days, so I think I will add some nitrogen, thanks!
 
s.t.oner said:
Looks like there hungry to me, just my opinion
whats the ppm, im not up to speed on "ec" values.....?
Click to expand...

they were around 500-600, I've since increased it to around 900.

Once I got aggressive with the CO2 this happened, so I'm glad it's nitrogen, I'll be changing my res tomorrow so I'll just make sure to add about 25% more than what I had intended and work up.

Any reason why one in particular showed this deficiency so much more? Just a hungrier plant? They're all clones from the same mother save a couple.

Thanks for the help!
 
when you switch to flowering alot of people make the mistake of switching to a bloom fert. For the first 2 weeks or so strain dependent you should stick with your veg nutes because when they are switched to 12/12 they go through a growth spurt as they stretch and they need all that N. after it has stopped stretching then switch to bloom ferts. This is what I had to do and it solved all my yellowing/deficiency problems the next go around.
 
I forgot to mention I went through 3 grows before I figured it out. I use a 20-20-20 at about half to/3/4 strength for my food jug. and plain ole water inbetween feedings.
 
So am I wasting my time foliar feeding them, and mixing some grow ferts with my bloom ones when I change the res?
 
jaysizzle said:
when you switch to flowering alot of people make the mistake of switching to a bloom fert. For the first 2 weeks or so strain dependent you should stick with your veg nutes because when they are switched to 12/12 they go through a growth spurt as they stretch and they need all that N. after it has stopped stretching then switch to bloom ferts. This is what I had to do and it solved all my yellowing/deficiency problems the next go around.
Click to expand...


I was going to recommend the same thing. It also took me a couple grows to figure that out, after some trial and error.LOL I'd give it a couple days of veg fert, then switch back to bloom after a week or so.
 
When i make my switch to bloom, i starve um for light for 24hrs then on to 12/12
and hit them with some sort of bud sparker, i use "bud blood"
and 1100 ppm of bloom nutes, and i have never had any problems with yellow leaves, not till flush week....
Everybody does it different, so this is just my opinion,

but food for thought, my last run 24 plants (2) 1000w lights......3 pounds of sticky sticky....
Just keep practicin......

Good luck
 
What is the PH of your water after adding everything? What is the PH of your runoff? If you don't know don't start adding anything. With hydroplex your PH will plummit a full point for every 5ml. If low soil ph is the case, calcium and magnesium get locked out at anything under 6.2. adding more will not do anything until you fic your ph. Do you adjust the ph before you water?
 
BKCSG said:
What is the PH of your water after adding everything? What is the PH of your runoff? If you don't know don't start adding anything. With hydroplex your PH will plummit a full point for every 5ml. If low soil ph is the case, calcium and magnesium get locked out at anything under 6.2. adding more will not do anything until you fic your ph. Do you adjust the ph before you water?
Click to expand...

I do an ebb and flow set up, the PH is always between 5.8-6.1. I check it daily along with the EC.

Also, I add my nutes, etc, then I PH the RO water not before.
 
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