New to soil. Deficiency of some kind... Maybe a pH issue?

[Scroggy Nettleson]

I am relatively new to growing in general, but started and became pretty good at hydro. I have tasted some pretty good stuff grown in soil and it prompted me to see which way I like best, and how each strain changes in different mediums.

I am at different stages on 3 plants. 2 in COM and 1 in Roots Organic.

I haven't been using anything on the 2 in COM (Stonington Blend) and have been using aurora roots organic in the roots organic soil. I have started noticing yellowing, almost overnight and the greener leaves are getting lime colored or yellow-ish spots on them.

I ended up looking into it and have come up with different ideas, but not being one who is a soil grower, I thought I'd ask someone who is.

I'm withholding my thoughts, not to say "ah yes, I knew it" but to not taint the waters and see what someone with experience thinks.

The Critical Cheese is in Stonington @ 4 weeks of 12/12 and the Headband 707 is at 3 weeks of 12/12.

 

[chemphlegm]

plants use less N during halfway in flower. bloom formulas often have less N in them. Old leaves yellow and die off
on most all my fruits and veggies outdoors, as their flowers dry up and fruit/seeds are finishing.

 

[Los Reefersaurus]

your roots have been too dry and too warm , maybe not too dry...... I am just diagnosing from a picture for F's sake and this ain't costing you a red nickel. Any way this is a good start for your first kick at the can for dirt. The damage is done just limp her in I am sure you will still get a good pull from her. Next run pay attention to the temps of the dirt, and keep it cool , like you did with ye ol' hydroponics

 

[Scroggy Nettleson]

your roots have been too dry and too warm , maybe not too dry...... I am just diagnosing from a picture for F's sake and this ain't costing you a red nickel. Any way this is a good start for your first kick at the can for dirt. The damage is done just limp her in I am sure you will still get a good pull from her. Next run pay attention to the temps of the dirt, and keep it cool , like you did with ye ol' hydroponics

I've never had water temp issues with the hydro so that one never crossed my mind. Thanks for the info.

 

[LemonChello420]

What pH are are you using? Could be cal mag deficient.

 

[Bugeye]

I think anytime you have interveinal yellowing on the bottom of the plant you have to think magnesium deficiency, and brown spotting on newer leaves suggests calcium deficiency. I've never heard of warm dirt doing this so that is an intriguing idea I've never explored. Did you lime your soil a little? Straight roots seemed weak to me on cal/mag. Good luck, finish strong!

 

[drsaltzman]

You definitely need a calmag supplement with Roots Organic.
It's mostly coco and perlite.
Their 707 is better than their regular potting soil but it needs some amending too.
Also this stuff is great mixed into your feedings. Helps plants access everything nutritionally.

https://www.realgrowers.com/product/recharge/

Hit your plants with some calmag at first. Many times that's all it needs.

 

[Keith Stoner]

I'm gonna have to agree on the Cal./Mag. deficiency, also dumb question but have they happened to been taken outside for any of the grow?

 

[Ghost of Davy Jones]

Looks like the start of Cal/Mag deficiency. usually it starts affecting the upper leaves first because they're closest to the light and heat.

 

[Los Reefersaurus]

it is a mag deficiency, , Cal mag is not an element. Magnesium is readily available in nearly all fertilizers . The way we deduce this is we tend to use is a really basic scientific method. Take away one element and see the result. So we now have a fantastic chart of deficiencies and and surpluses. wE NATURALLY then think what is the problem ? There isnt enough mag. There for add more mag. BUT where this basic science so far and basic logic have failed us is that they don't ask why. Why is this plant not taking up Magnesium? In this case I would bet is that the roots are underdeveloped and weak there for it cant supply the is amount of mag that is other wise totally available and totally soluble.


So what is the showing symptom? Mag deficiency

Why is it deficient? Either the roots cant get this readily available element , or the element is absent.
Occam's razor? The roots are weak
Why are they weak? Its summer and he is using air pots on a laminate floor.
Deduction: if he isnt taking care of the floor , he probably isn't taking care of other variables like temps and humidity.

There for the room is too hot and the roots are probably over 77-80 degrees.

and that is how you get to weak roots

 

[Ghost of Davy Jones]

it is a mag deficiency, , Cal mag is not an element. Magnesium is readily available in nearly all fertilizers . The way we deduce this is we tend to use is a really basic scientific method. Take away one element and see the result. So we now have a fantastic chart of deficiencies and and surpluses. wE NATURALLY then think what is the problem ? There isnt enough mag. There for add more mag. BUT where this basic science so far and basic logic have failed us is that they don't ask why. Why is this plant not taking up Magnesium? In this case I would bet is that the roots are underdeveloped and weak there for it cant supply the is amount of mag that is other wise totally available and totally soluble.


So what is the showing symptom? Mag deficiency

Why is it deficient? Either the roots cant get this readily available element , or the element is absent.
Occam's razor? The roots are weak
Why are they weak? Its summer and he is using air pots on a laminate floor.
Deduction: if he isnt taking care of the floor , he probably isn't taking care of other variables like temps and humidity.

There for the room is too hot and the roots are probably over 77-80 degrees.

and that is how you get to weak roots

Very good observation. I agree with you that finding the underline cause and fixing it is just as important as treating the deficiency. It's just like going to the doctor.