I keep getting this yellowing/bleaching

[Green Refuge]

Every now and then I get a plant that does this. Some in soil some in coco. Could it be my well water ? What else could cause such a dramatic shift ?

 

[hotrodharley]

I see lightening along leaf edges. Possible start of potassium deficiency. Common with coco. However tell us how you have been feeding to this point.

 

[Herb & Suds]

It could be “some in soil , some in coco “
I have know idea how to run different mediums and try and compare them
Way different grows
The one in soil likes well water and less watering
The coco wants fed twice a day and r/o water phd in the high 5’s
Don’t even get me started on phenos
Sometimes less is more

 

[Green Refuge]

I see lightening along leaf edges. Possible start of potassium deficiency. Common with coco. However tell us how you have been feeding to this point.

These two haven't been feed a full course meal yet since they were transplanted into roots organic original 2 weeks ago. I've only given them water and a little recharge and seaweed here and there. Been watering them once every 3 days. This my first time using this medium and it seems to dry out faster than ff soil. It's a peat/Coco mix.

 

[Green Refuge]

It could be “some in soil , some in coco “
I have know idea how to run different mediums and try and compare them
Way different grows
The one in soil likes well water and less watering
The coco wants fed twice a day and r/o water phd in the high 5’s
Don’t even get me started on phenos
Sometimes less is more

I should've phrased that better. What I was trying to say is I got this bleaching in both coco and soil so I know the problem is not in the medium. I have well water it worked good for me last year but I'm starting to think I need to do a water test just to make sure that's not the problem.

 

[Green Refuge]

And don't mind the steel wool I ran out of sand. Not a single fungus gnat in sight. Not even the odd one that Flys by your face just to show off. Zero.

 

[OldMedUser]

Looks like low iron but zinc looks similar but gives the purple stems. You're going to want to get that steel wool out of there before the plant with it begins to look like the left side of this diagram. Rusting steel wool will add way too much iron to the plants.

I just ODed my plans on iron recently and had to flush like mad to wash it out and they are just getting over that. Damn near killed them all adding a lousy tsp of chelated iron to the water I used to moisten new 60L batch of mix. I have 50L of it left and will be mixing it 3-1 with plain promix hp before using it again. In 48 hours half the leaves on all of them looked like that big fan leaf 2nd from the top on the left.



If it is low Zn and Fe then it's possible your pH is out of range and making it hard for the plants to absorb them. That's about the most common reason for micronutrients to suddenly unavailable.

Excess P can block both of those as well.



Here's the whole chart. Have to play detective a bit and check all the clues to help zero in on the problem.



Good luck!