Yellow and burnt leaves

Dloberger

Member
IMG_9577.JPG IMG_9579.JPG IMG_9576.JPG IMG_9578.JPG what seems to be the problem with this? I am running 5 autopots and 2/5 seem to be getting yellow and drying off. I thought nitrogen so I gave it a boost yesterday. Still looks like shir today.. thanks :)
 

*BUDS

Well-Known Member
Its very def in K. When plants are not taking up K they have no defence against disease and this is what happening to your plants.
I think its a ph/ feeding issue you need to fix asap. Maybe foliar feed with potash liquid.
Those sick ones will struggle to come back.
 
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im4satori

Well-Known Member
there lacking in calcium and magnesium and need some calmag

they don't look over fertilized

whats your medium?
what fertilizers?

most of the time 1/4 tsp Epsom salt per gallon and 3 to 6mls calmag per gallon every or every other watering depending on your source water and fertilizer medium or soil type

first you can spray them a couple times with 1/2 tsp Epsom salt

second you might spray them one time with 4mls calmag

but do them separately to be cautious and space them out 3 days between

maybe; Epsom on Monday, calmag on wednesday Epsom again on Friday
 

im4satori

Well-Known Member
they do look hungry over all

just don't go and over fertilize them and make what is a mild issue a big problem

tell us about your fertilizer so we can help figure out an appropriate amount... don't rely on the instructions on the bottle !! its almost always too much!!

brand of fertilizer and the npk% numbers

how you mix it currently
 

Dloberger

Member
Sensi A Grow- NPK 2-0-0- 5 ml per gallon
Sensi B Grow- NPK 1-2-6- 5 ml per gallon
Neptunes Fish and Seaweed- NPK 2-3-1- 2ml per gallon
CalMag- NPK 2-0-0- 5ml per gallon
Silica Blast- NPK 0-0-0.5- 5 ml per gallon
Superthrive- 1 ml per gallon


I usually add 7-8 gallons of nutrients and add water til i get to my desired ppm. I then ph balance it to 5.6-5.8 somewhere inbetween that because it goes up over the days.

I am using Autopots in 100% coco with an inch of hydroton on the bottom.

I think i am going to stop using the self feed and just hand feed the plants from now on. I dont like this system. The other half of my plants are 2 weeks behind and they are in fox farms soil. they are looking amazing
 

im4satori

Well-Known Member
ya that's a low amount of fertilizer
lets get you straight.. tell me

whats the % amounts for calcium, magnesium and iron in the part A and part B and the sea weed
 

im4satori

Well-Known Member
theres nothing wrong with the system you just need to dial it in

youll find the fox farm soil will ask for magnesium first and calcium second...
 

im4satori

Well-Known Member
the reason your ph swings up so fast is because your under feeding... when we increase the EC/ ppm and balance it the ph should swing more slowly
 

im4satori

Well-Known Member
mix for veg

part A 8mls
part B 8mls
Neptune 2mls is fine
silica 5 to 10mls is good (depending on your ph)

to determine the amount of calmag and Epsom salt youll need.. I need the requested info
but typically its about

2 to 5 mls calmag and 1/4 tsp Epsom salt per gallon
 

im4satori

Well-Known Member
ok

so that's PLENTY of calcium already assuming your using the 8mls per gallon so theres no need for calmag

but they didn't list anything for magnesium % ???

that makes it hard to know whats in it. id like so assume it has some in it and they didn't list it??... id start with 1/4 tsp per gallon Epsom salt added each time you fertilize
 

Dloberger

Member
so foliar feed them with epsom salt and cal mag. ?

Im new to foliar feeding.. I understand how to and everything but when should i foliar feed? what kind of things can i foliar?
 

im4satori

Well-Known Member
no

you don't need calmag

your base nutes have enough calcium so don't use it at all

yes foliar feed the Epsom salt
 

im4satori

Well-Known Member
so foliar feed them with epsom salt and cal mag. ?

Im new to foliar feeding.. I understand how to and everything but when should i foliar feed? what kind of things can i foliar?
for now

you shouldn't foliar feed anything unless you have a problem that needs correcting

maybe just neem oil or azamax 1x a week or 2

later when your feeling frisky you can play around with kelp, amino acids, fulvic acids, silica

but don't do it yet... itll just create more possible issues
 
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