Deficiency help.

[Speed of green]

so i have these plants in flower, they are about 5 weeks along.

in 2 gal hempy buckets. 75%perlite 25% vermiculite
jacks 5-12-26 @450ppm
5.8ph - freshly calibrated bluelab ph pen.

i was using calnit until about five days ago, i was told to drop the calnit around week four.

weeks 1-4 received jacks @450ppm Calnit @300 ppm ph 5.8.


Temps are never over 81, humidity is in the 50's the deficiency is present on the shaded side of the canopy and the bulb side, and it doesn't seem to start at either the top or the bottom of the plant, its kind of everywhere.

 

[DONAJTHEIII]

so i have these plants in flower, they are about 5 weeks along.

in 2 gal hempy buckets. 75%perlite 25% vermiculite
jacks 5-12-26 @450ppm
5.8ph - freshly calibrated bluelab ph pen.

i was using calnit until about five days ago, i was told to drop the calnit around week four.

weeks 1-4 received jacks @450ppm Calnit @300 ppm ph 5.8.


Temps are never over 81, humidity is in the 50's the deficiency is present on the shaded side of the canopy and the bulb side, and it doesn't seem to start at either the top or the bottom of the plant, its kind of everywhere.


[URL=https://www.icmag.com/ic/picture.php?albumid=65551&pictureid=1625769&thumb=1]View Image[/url] [URL=https://www.icmag.com/ic/picture.php?albumid=65551&pictureid=1625768&thumb=1]View Image[/url] [URL=https://www.icmag.com/ic/picture.php?albumid=65551&pictureid=1625767&thumb=1]View Image[/url]

That shit looks burnt bro lol

But your saying your using 450ppm to feed Jesus Christ.

I don't think I even feed my clones with water that weak.

Check runoff next feed looks like salt buildup and shits Imbalanced. If runoff is low ppm then bump that ec over 1.0. I use ec not ppm but either way your ppm is way too low. I can't believe your in flower and haven't had problems during veg. If the runoff is way higher than what you've been feeding then water next time with. 6-.7 ec until What's coming in is what's coming out in the runoff. Then resume feed above 1.0ec

 

[Speed of green]

If the pot is getting too dry between the watering cycles would that cause a salt buildup even with these low ppm feelings?

I'll bump the ec to .7 and flush the pots until the runoff is the same, I think I might have to go to multiple waterings a day to keep them moist.

 

[CoastalKind]

That looks like calcium deficiency to me due to all the necrosis. Rather advanced too. Unfortunately calcium in not very mobile and the damaged or deficient leaves will recover slowly if at all. However the new leaves will be healthier if you apply some calcium to your fertilizer regiment. I have a lot of experience with calcium deficiency as it was the most common problem on the property where I first started growing...and still is unless the soil is amended. Without calcium the plants will wilt quickly, be generally less vigorous, and eventually it will cause blossom end rot in developing fruits and necrosis on leaf margins. I have seen it on on everything from squash and tomatoes to corn to ginger. What is your fertilizer regiment? Are you growing in soil or hydroponically?

 

[CoastalKind]

Don't flush the pot, that will just exacerbate the process by leaching more calcium from the plant....poor plant.

 

[CoastalKind]

Can you post a picture of the whole plant?

 

[redlaser]

I've been having plants in veg gradually get that way after 60-75 days after planting clones in pro-mix and using Pure blend Pro grow at half strength regularly. It started with the lower half of the plant and eventually the tops went yellow.
Had the water tested and chloride was 379mg/L, way beyond usable without ro treatment