(more) yellowing leaves

Some pics from my latest grow. SCROG 28 days in 12/12. Getting some yellowing in the middle. I'm thinking Nitrogen deficiency? Also there are some burnt tips, as if nute burn, so I'm not sure what's going on... i'm growing in soil and giving slow release organic plant food.

looks like a lack of nitrogen, when problems like this arise i usually reference this. as for the tip burn, you could be overfeeding other nutrients, id give them a flush then a good dose of nitrogen.

how do i give them just nitrogen? recommended fertilizer?

fangule gave a good suggestion, kelp and fish emulsion are pretty high in N, i use my own homemade worm castings. would be a good idea to start compost for your next run, saves a bunch of money and actually gives rotting fruit and vegetables a purpose, to be broken down and fed to your plants.

^^^^^ Yup I concur. I stared my Vermi bin in Jan "14". She almost ready.

what i have been giving her is this espoma plant-tone which is 5-3-3 so it's hard to believe there is a nitrogen deficiency.

http://www.lowes.com/pd_79144-1321-PT8_0__?productId=3043968

m3d1c1n3man said:

what i have been giving her is this espoma plant-tone which is 5-3-3 so it's hard to believe there is a nitrogen deficiency.

http://www.lowes.com/pd_79144-1321-PT8_0__?productId=3043968

Click to expand...

I use the same thing.

Some strains demand more N than others though.

its in soil?
if so how long has it been in it
did you use dolomite in your mix ?
what are you giving for cal / mag ?

exactly, you could have yourself a heavy feeder, during mid flower they really start to feed. overwatering could also be contributing, those leaves do have a bit of a droop to them but it could be that you just watered as well. couldnt hurt to pH your runoff as well.

and glad to see another person who knows the power of superthrive and blackstrap molasses, props fangule.

any pics other then HPS ?

Thanks I tip my hat to you

N def presents from bottom up; this is diffuse yellowing. I don't like the size of that pot for such a large plant, I hate time-release ferts. I use totes, twice the size of that pot, for big plants.

tekdc911 said:

its in soil?
if so how long has it been in it
did you use dolomite in your mix ?
what are you giving for cal / mag ?

Click to expand...

yes
several months
no
general plant food espoma plant tone with micro nutrients http://www.lowes.com/pd_79144-1321-PT8_0__?productId=3043968

DonAlejandroVega said:

N def presents from bottom up; this is diffuse yellowing. I don't like the size of that pot for such a large plant, I hate time-release ferts. I use totes, twice the size of that pot, for big plants.

Click to expand...

it's a 5 gallon bucket, with not much drainage like perlite so it's packed with nutes, i mixed a lot of that espoma into it. i don't see how i'm getting deficiency and severe burning at the same time, sometimes even on the same leaf! I think a good flush is in order as it hasn't been done in a couple months. could be salt build up and nute lockout possibly?

the food says its slow release
cal/mag will yellow too why i was asking
possibly ph
thats why i asked about the dolomite and soil age PH may have fell out
calcium may be locked out and taking the mag with it
and the burn maybe from the N

just my opinion brother
but id start with ph

** edit just to be perfectly clear so im not starting a flame war

im not saying a cal/mag feed will fix it
im saying i think it is a symptom of a PH problem and when its remedied the calcium will become available and then the mag can




BTW forgot the most important part ........................
that is a monster brother Good Job!!!!!

tekdc911 said:

just my opinion brother
but id start with ph

Click to expand...

yea but how do i cure ph in soil?

you can top feed dolomite assuming its acidic