Organic Soil ph, yellowing, purpling,

Hello all,
I’m growing in organic soil using subcool recipe & My runoff ph is 7.4. Is this ph too high? Some say I don’t need to adjust organic soil ph some say ph the water to 6.5
My plants have been yellowing from bottom & showing mag def, but watering/foliar with Epsom isn’t correcting the problems.
I’ve been getting different answers on this, any help would be appreciated.

Looks more nitrogen deficient than anything.
So you're in organic soil, but are you feeding them anything. If the plant has been in the soil a while, it's likely depleted of nutrients.
I also grow in organic soil and pH all inputs to 6.5, I never water enough to get run off to measure.

PrimeUK said:

Looks more nitrogen deficient than anything.
So you're in organic soil, but are you feeding them anything. If the plant has been in the soil a while, it's likely depleted of nutrients.
I also grow in organic soil and pH all inputs to 6.5, I never water enough to get run off to measure.

Click to expand...

Thanks Prime. I’m not feeding them any bottled nutes. I used subcool super soil recipe and they’ve been in the soil for about 10 weeks. I was planning on transplanting to 10gal square pots using the same soil mix that’s just been cooking longer. Shouldn’t that help?

Yeah, I should think it will help long term, but you need nutrients now. Organic ones will take too long to be effective, especially as you look like this has been going on a little while.
Pot up asap, but I would strongly advise you use some simple nutrients, regular soil ones not organic ones. Ionic salt nutes are able to be absorbed by the plant sooner, helping with the deficiency

PrimeUK said:

Looks more nitrogen deficient than anything.
So you're in organic soil, but are you feeding them anything. If the plant has been in the soil a while, it's likely depleted of nutrients.
I also grow in organic soil and pH all inputs to 6.5, I never water enough to get run off to measure.

Click to expand...

Its good to top off the pots with fresh mix occasionally.
What I'm seeing is a plant relocating N from the bottom to other areas. Normal nearer to the last trimester, if I can borrow the expression.

Transplant to fresh mix with some worm castings and more fertilizer added. I use Charlie’s compost brand chicken manure myself but what you decide to use is your choice; just mix in a handful in the bottom layer of soil when you build your pots. Add granular mycorrhizae in the hole when you transplant so it’s touching the root ball. Don’t bother with ph adding organic material should help bring it more acidic.
Consider giving them soluble npk like a liquid fish. They need a boost of N right away. I like Neptune’s harvest w/seaweed but again it up to you; even a generic brand fish emulsion like maxi crop is better than nothing. For bloom phase check out Jobes organic spikes. Very easy just plug them in and they feed for 8 weeks; 2 per container will help keep them green through most of bloom phase.

Thanks for the help guys. Fed with fish emulsion and they’ve perked up like tell them we said thank you. Hadn’t saw them this happy in a couple of weeks. I’ll be potting up tomorrow, well later today to 10gal to prepare for flower.
Thanks again