Need help identifying a problem

lunchbox22 · Apr 2, 2023

I have two plants in early veg. I think both are showing signs of a potential deficiency.

The first plant (photos 1&2) looks like a potential magnesium deficiency?

the tips of the lowest leaves are begging to spot and curl?

I previously removed the first two single true leaves on this plant as they had wilted half way and now the second plant (photos 3 &4) is showing the same wilting symptoms in the lowest leaves.

both plants are growing daily and appear to have pretty healthy new growth depsite the one have a very dark green appearance

coco coir grow using General Hydroponics nutrients. Feeding twice a day - pH of my mixed gallon is 6.1. Photos we’re taking about an hour before lights off so they’re looking a little droopy

MickFoster · Apr 3, 2023

What is your water source?
Are you sure your pH meter is calibrated?

lunchbox22 · Apr 3, 2023

It's tap water. pH out of the tap is around 7.6-7.8 and by the time I mix the nutrients up the solution is 6.3-6.5.

I'll double check calibration but I had just done it and it was reading accurate in the calibration solutions.
I'm using a Apera digtal meter

Budzbuddha · Apr 3, 2023

Those single and 3 finger leaf are early set leaves and will be expendable as more mature 5-7 finger ( or more ) leaf sets grow in . I wouldn’t hyperfocus on those to much as their time will come and would probably be clipped for pruning purposes later.

As long as plant is pushing forward and there is no systemic ( plant wide ) issue i would just carry on.

As far as one color compared to another - simple answer - they are two different plants … no 2 will feed the same or grow the same. Pigmentation variations happen. They look fine.

lunchbox22 · Apr 3, 2023

Budzbuddha said:
Those single and 3 finger leaf are early set leaves and will be expendable as more mature 5-7 finger ( or more ) leaf sets grow in . I wouldn’t hyperfocus on those to much as their time will come and would probably be clipped for pruning purposes later.

As long as plant is pushing forward and there is no systemic ( plant wide ) issue i would just carry on.

As far as one color compared to another - simple answer - they are two different plants … no 2 will feed the same or grow the same. Pigmentation variations happen. They look fine.

Right on! Appreciate that. I've grown vegetable gardens but this is my first cannabis grow and first time growing indoors in coco with so much control... paranoid about the abundant opportunities to fuck things up!

Trying to catch small problems before they're big problems.

Phytoplankton · Apr 3, 2023

Looks like a little stress from too much water. Let the pots get pretty light before you water. Overwatering drowns the roots and then they can't absorb the nutes the plants need.

Need help identifying a problem

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