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Is this a sign of pH issues?

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Is this a sign of pH issues?

Custom45 3 Replies 570 Views
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Custom45

Custom45

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#1
In week three of veg, have 4 plants in a 8ft X ft8 tent, all showing this signs on a few leaves. This has happening over past 36 hours since the last feed, they were fine before that.

In Coco pebble mix. Feeding at around 2.4ec as they're using co2. Have been adding a little extra calmag in addition to the a+b. Ph was around 5.8 going in, but that may have been wrong as I'm not confident oh pen was reading accurately, it could've been much lower, like 5.2. 300w led lights, currently set at 60% and having about 36" above canopy.

Is this a sign of ph issues
 
#2
A low pH can cause deficiencies that could look like similar. The picture is too small for me to see it well, so I'm not sure. I also don't grow with the methods you're using. I can bump the thread, though.
 
#3
Yea pH inflow within the range of 5.5 to 6.5

I think i see leaves canoeing upwards.

Overwatering - How many times per day are you watering?
Over-Fertilization - 2.4 / 1200ppm is ok
Heat Stress - How hot is it in your tent/grow area? What's ur PPFD?
Windburn - do u have a fan blowing on them?
 
Last edited:
#4
Watering once per day, I watered from the top until the autopot tray started to half fill, then left the plants to soak it up. I'm switching the valves on today so they'll bottom feed using the autopot valves rom now on.

Temls around 26-27⁰, but I'm running co2 so should be ok?

Have fans yes, but not blowing directly on them.

I'll check light levels, but lights are at around 180w and approx 36" high.
 
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