What does this look like it could be ?

[Timv]

Started happening right around when I introduced the PK

 

[JIMKSI64]

Looks PH y . Any idea on pH?
Hehe Google AI lens says it's a blue dream with a deficiency which can be caused by pH.

 

[Timv]

Looks PH y . Any idea on pH?

Always 5.8 unless I need to recalibrate again but I just did before this crop

 

[JIMKSI64]

I calibrate every 10 uses and picked that number based on the 60 journals I read.

 

[Timv]

I calibrate every 10 uses and picked that number based on the 60 journals I read.

You think it could be a potassium issue though?

 

[Timv]

Bump

 

[JIMKSI64]

You think it could be a potassium issue though?

When you show a deficiency you eliminate things that cause a deficiency before you add chemicals to treat. pH testing is always recommended as a first step. To just add chemicals can just make it worse if it is pH related or root problems from rot or pests.
Zero point tester slurry test or runoff test and ensure you have spot on pH and then treat.

 

[Timv]

When you show a deficiency you eliminate things that cause a deficiency before you add chemicals to treat. pH testing is always recommended as a first step. To just add chemicals can just make it worse if it is pH related or root problems from rot or pests.
Zero point tester slurry test or runoff test and ensure you have spot on pH and then treat.

In just one day the purple has gotten worse and these are 2 different strains. Will be testing the runoff today

 

[Timv]

The runoff numbers
I feed
1250 ppm
5.8 ph

 

[RoadKillSkunkHunt]

Tip necrosis does look like its "K" related. However we need more details or we're playing a guessing game. What's your whole routine? Nutrient line, lighting, temp/vpd etc. Your ppm looks high enough that I wouldn't think you're deficient but your N-P-K ratios may be off. When ratios are out of balance, your plant could have trouble uptaking a needed nutrient even its present in your mix. For example, too much calcium will interfere with Mg uptake. You have zebra striped older fan leaves.

 

[Timv]

Tip necrosis does look like its "K" related. However we need more details or we're playing a guessing game. What's your whole routine? Nutrient line, lighting, temp/vpd etc. Your ppm looks high enough that I wouldn't think you're deficient but your N-P-K ratios may be off. When ratios are out of balance, your plant could have trouble uptaking a needed nutrient even its present in your mix. For example, too much calcium will interfere with Mg uptake. You have zebra striped older fan leaves.

Nutrient line: Canna
Lighting : LED
Temp: 72 to 80
Humidity: 50-63ish I did have some spikes up into 70s but resolved that

 

[RoadKillSkunkHunt]

Nutrient line: Canna
Lighting : LED
Temp: 72 to 80
Humidity: 50-63ish I did have some spikes up into 70s but resolved that

Are you growing in soil? Coco?

 

[JIMKSI64]

Google Search

If you put in 1250 ppm and you get 1370 out that indicates a buildup leading to lockout according to ai. If I am reading this backwards it indicates uptake of nutrients is working.

 

[Timv]

Are you growing in soil? Coco?

Growing in coco

 

[Ninjadogma]

Try and get that runoff pH increased just a little bit to 6.0 to correct your cal mag lockout.

 

[Timv]

Google Search

If you put in 1250 ppm and you get 1370 out that indicates a buildup leading to lockout according to ai. If I am reading this backwards it indicates uptake of nutrients is working.

Hmm I’ve been thinking possible lockout if increasing ppm too soon could’ve been an issue but I don’t feel as I did

 

[Timv]

Try and get that runoff pH increased just a little bit to 6.0 to correct your cal mag lockout.

Should I do a foliage spray for now and should I just start feeding at 6.2 then ?

 

[Ninjadogma]

Hmm I’ve been thinking possible lockout if increasing ppm too soon could’ve been an issue but I don’t feel as I did

The accumulation is also likely what's causing the low pH runoff.

 

[JIMKSI64]

If this is a salt lockout from buildup a medium flush is recommended to get the salt out of the coco. Ask coco growers about this. I run organics but I hear stuff. If the reason you have locked out cal and mag is salt buildup just adding cal-mag mag will not work until you have so much in it throws pH to high At this point you lock out the other nutrition. I have read this so often even I remember it.

 

[RoadKillSkunkHunt]

Should I do a foliage spray for now and should I just start feeding at 6.2 then ?

No, never spray anything liquid on flowering cannabis. You might get away with it for a while but its an invitation for trouble.

The accumulation is also likely what's causing the low pH runoff.

I second that ... Since you're in coco and its basically inert, you can flush out the soil like has been suggested by another poster. You can use a wetting agent if you like to help break up the salts buildup. However, afterwards you will need to water with a round of nutrients because you will have stripped the accumulation from the coco. Just reset lower than 1250 ppm.