What is this deficiency?

have you checked the charts? there are alot of them, ya know. if it was a game, with zero information, as it is - i mite say mag and sulpher second,

im sure you can take it from here

Thanks man sorry was pretty vague well I know the soil is 6.5pH so I don't think its pH related. I was thinking magnesium aswell based on my research was just after another opinion.

opinions are like.....well u know

i am not the problem solver here in GC, i'm the guy saying go figure out what the problem is on your own, so the learning is 'organic', will stick in your brain, and will make a better farmer out of ya.

it's just like school, if you cheat on tests, you dont learn shit. if someone is always telling peeps wut they are doing wrong, the organic learning suffers along with cognitive recognition of problems and situations in life and plants.

.02

My first instinct says Iron

What method do you use to test pH?

It looks like a classic magnesium defiecency. What growing methods are you using? What medium are your plants in?

And! Where on the plant are you seeing this symptom. Upper, lower, new old?

Getting help on plant problems is like an interogation. Everyone needs all the facts up front such as: .Soil/hydro, fertilizer (amounts type frequency), type of pot/size, watering schedule, type of light (distance to plant), and any other random facts you can throw in there lol.

Coloradoclear said:

Getting help on plant problems is like an interogation. Everyone needs all the facts up front such as: .Soil/hydro, fertilizer (amounts type frequency), type of pot/size, watering schedule, type of light (distance to plant), and any other random facts you can throw in there lol.

Click to expand...

It’s true. Data is important.

If i had to take a guess.....
Like everyone else is,
IMHO
Its calcium deficiency.
Magnesium, forms a V, from the tip in. Its commonly termed "The magnesium V".
Calcium, can be yellowing between the vaines
The V's form first, before yellow between the vaines with magnesium.
Have you given pleanty of magnesium? Magnesium can inhibit calcium from absorbing.
It does look like iron. Although iron begins, on the tops, and new growth .Yours looks like a fair aged fan leaf.
If you put a gun to my head. id say it was deficient in calcium, somehow.
But its a guess, none the less.