Auto in coco showing spots on leaves - please help!

[Cwmoore577]

It’s a Zkittlez autoflower in Royal Gold Tupur mix. Tent is always 70-71°F and 50-55% RH. I feed twice a day with 8-10ml/gal of General Organics BioThrive Grow (NPK 4-3-3) and 4-5ml/gal of Emerald Forest CalMag (NPK 2-0-0). I pH to 5.8-5.9 with CES pH Up. I measure the EC and TDS and currently feeding EC around 900-1000 and PPM of 600-700.

I also just noticed that it may be my beginners error in mixing my nutrient solution in the morning, watering half in the am and half in the pm. I never checked pH after it sits for the day and just did which read high at 6.35. Could that be my issue?

A couple leaves are showing white spots

And then there are 3 or 4 leaves showing these grayish spots




Also, I’ve been training the plant with metal wire and hemp cord that I have tied around the smart pot as you can see in the picture below. With the coco always being saturated it looks like mold is growing on the hemp cord. Could that affect the plant? Should I try to find another way to use tie downs?

 

[Cwmoore577]

Here’s a picture of the whole plant

 

[TintEastwood]

Tupur is coco, but kinda soil?? not sure, never grown in Tupur
I suspect PH. Try to keep it consistent going in. Around 6.2 better than 5.8 I SUSPECT, but hopefullly a Tupur grower will chime.
Same with TDS/EC, keep it consistent.

Coco college.

Table of Contents - Articles, Tutorials & DIY Projects - Coco For Cannabis

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3 Gallon or 5 Gallon

Hey all wassssup? my first /last grow i used 5 gallon fabric pots for flower and i had a sweet first grow. I got 3 gallon pots that i want to use so i can fit a couple more plants in,lol. Would the 3 gallon pots suffice? Right now they are in 1 gallon fabrics and i need to switch pots before i...

www.rollitup.org

 

[Cwmoore577]

Tupur is coco, but kinda soil?? not sure, never grown in Tupur
I suspect PH. Try to keep it consistent going in. Around 6.2 better than 5.8 I SUSPECT, but hopefullly a Tupur grower will chime.
Same with TDS/EC, keep it consistent.

Coco college.

Table of Contents - Articles, Tutorials & DIY Projects - Coco For Cannabis

Reliable scientifically informed resources for growing cannabis. Horticultural science for home growers! Articles, Tutorials, DIY projects & Product Guide.

www.cocoforcannabis.com

LST option. (eliminate string)

3 Gallon or 5 Gallon

Hey all wassssup? my first /last grow i used 5 gallon fabric pots for flower and i had a sweet first grow. I got 3 gallon pots that i want to use so i can fit a couple more plants in,lol. Would the 3 gallon pots suffice? Right now they are in 1 gallon fabrics and i need to switch pots before i...

www.rollitup.org

Yea that coco website is a godsend. I’ve read it all on there and taken a shit ton of notes.

That’s what I imagine it might be.. letting the nutrients sit in a jug making it rise.

 

[kingromano]

yeah little calcium deficiency .. do you feed tap water with your nutrients

 

[Cwmoore577]

yeah little calcium deficiency .. do you feed tap water with your nutrients

I use ro water. Do you think 4-5ml/gal is not enough?

 

[Capn-Crunch]

4 or 5 mil is enough

 

[Cwmoore577]

4 or 5 mil is enough

That’s what I thought. Do you think the spots could just be from ph fluctuations?

 

[kingromano]

what is the runoff ph and ec .. if ec is high probably salt accumulated that block calcium assimilation

 

[Cwmoore577]

what is the runoff ph and ec .. if ec is high probably salt accumulated that block calcium assimilation

Most that I’ve read said to disregard checking runoff but I just checked it. EC was 1050 and the pH was pretty high at around 6.7-6.8