4 sick plants

[stonehead]

Also they looked light which was the reason I started the nutes when I did start and have had a lightish look most of the time

 

[stonehead]

In my position what would you do? Just water? According to my canna pk 13/14 they will be due soon for their pk shot

 

[swerve]

What's your runoff looking like? PH / PPM

 

[stonehead]

Ph always around 6.3 same as what it says on the bag tbf. Ppm or etc I don't check, can see how it would help now it's mentioned so I knew if I was over feeding but these are the reasons I'm not useing coco sadly.

Soil is supposed to be easier and it seemed to be easier useing the verve soil than the bio bizz

 

[swerve]

Yeah I've used soil years ago like 6 growing in coco now. From your pics and what your saying sounds like nutrient burn I would give a watering with 3ml gal calmag water ph'ed at 6 until you get runoff and test it. I would say it would clear up within a week hope this helps

Ps. Nutrients cut 50% and slowly climb back up to where the plant is showing Healthy Growth.

 

[Waira]

...the way it's hammering along the veins, I'd say Ca defc.,.... beyond this, I'll need grow specifics and more pics; there's a form you can fill out here- https://www.autoflower.org/threads/...is-questions-first-before-posting-yours.8519/
..don't need all of it, but nute's/supplements, soil brand, lighting, feed dosing amount and schedule are most important, and soil pH!

 

[stonehead]

Everything's in my grow log in my sig ,
I don't have cal mag as never needed it but have Epsom salts. I've removed most of the affected leaves now which was mostly big fans

 

[Waira]

...epsoms are MgSO4, no Ca in there,... Ca and Mg demands tend to be pretty high among auto's, but it's still very strain variable... time to pick some up! I saw other symptoms forming on mid level leaves,...hopefully, this is just a lack-of type defc., not a pH related lock-out...doesn't look like it, buuuut,... I think an soild pH reading is called for, just in case-- prevention's easier than a fixing! Testing straight run-off won't give accurate pH ....in-medium soil pH testing is best done with a quality soil probe like the Accurate 8; avoid the cheapie skinny probe ones you see at garden centers, etc., they're notoriously inaccurate Otherwise, the run-off method using a pH meter is the alternative, and can be a poor one in general because it's prone to measurement errors,.. but if you follow this guide and calculation, it'll give a decent enough reading- https://www.autoflower.org/threads/another-quickie-reference-for-run-off-testing-and-ph-estimation.41733/#post-928975

 

[stonehead]

Il have to grab some cal mag should have had it anyway really, here's a lights out shot of the 4.

 

[stonehead]

an update on this, i got some plant magic cal-mag and had a few feeding with that and seems to be getting a bit of odour back but lost all the big fan leaves on most of the plants and they are still going slow but matureing.
im now thinking i have enough calcium in my water as on the thames water site it says my water is 272ppm of CaC03 but no mention of MgS04.

how can i find out how much of it is magnesium as im guessing its in with their figure? i dont want to lose these plants as only have 3-4 weeks left.
thanks