Interveinal chlorides - spotty on a adaxial side of lower leaves

A

Acannademia

Member

• Mar 28, 2019

• #1

Hello,

I am trying to figure out what is going on with my mother plants. They are being grown in a drip-feed system at 1000-1100ppm and pH 5.7-5.85. They are approximately 2 weeks old and we're topped yesterday. You can see by the photos that the lower leaves are showing some sort of Interveinal chlorides that is spotty in nature and is only visible from the adaxial (top) side of the leaves.

Cheers,

Acannademia

 

Attachments

• 
  20190328_102436.jpg

  46.1 KB · Views: 31
• 
  20190328_102337.jpg

  41.5 KB · Views: 21
• 
  20190328_102347.jpg

  56.4 KB · Views: 33

A

Acannademia

Member

• Mar 28, 2019

• #2

I meant to write "interveinal chlorosis"

PS: Is there no way to edit posts???

 

MJPassion

Observer

ICMag Donor

Veteran

• Mar 28, 2019

• #3

You are feeding too much and causing a pH lockout, IMO, but...
You haven't mentioned what you are measuring PPM with. It is important to at least list the meter that you are using because of some differences in the maths used to come up with the numbers that are displayed to you.
With my Milwaukee 802 meter I shoot for 600 to 800 PPM.


at 50 posts you will get your priveleges...
edit posts...
PM...
other stuff...

 

A

Acannademia

Member

• Mar 28, 2019

• #4

MJPassion said:

You are feeding too much, IMO, but...
You haven't mentioned what you are measuring PPM with. It is important to at least list the meter that you are using because of some differences in the maths used to come up with the numbers that are displayed to you.
With my Milwaukee 802 meter I shoot for 600 to 800 PPM.


at 50 posts you will get your priveleges...
edit posts...
PM...
other stuff...

Click to expand...

I am using an Asensetek Hi-Lux Lighting Passport. The PPFD was measured at an average of 522 umol photons / second x m^2

 

A

Acannademia

Member

• Mar 28, 2019

• #5

MJPassion said:

You are feeding too much and causing a pH lockout, IMO, but...
You haven't mentioned what you are measuring PPM with. It is important to at least list the meter that you are using because of some differences in the maths used to come up with the numbers that are displayed to you.
With my Milwaukee 802 meter I shoot for 600 to 800 PPM.


at 50 posts you will get your priveleges...
edit posts...
PM...
other stuff...

Click to expand...

Sorry I mis-read your post. PPM was being measured with laboratory grade pH/EC meters, and I confirmed it using multiple meters. Calibrated daily.

 

A

Acannademia

Member

• Mar 28, 2019

• #6

Thisis the EC/pH meter being used, as well as a hand-held one that showed the same results.

 

Fourtay

Active member

ICMag Donor

• Apr 2, 2019

• #7

Whats the water temps? Have you tried higher EC?

 

f-e

Well-known member

Mentor

Veteran

• Apr 2, 2019

• #8

I don't see your drip system, but dripping in pebbles isn't ideal. You need things like ring drippers to ensure some nutrient exchange. Just a single emitter will work below that single dripper, but nowhere else. Eventually roots will block up the feeds direct path out the bottom, and make it spread around a little more, but it's a fail.

I think what we see here is a poor start from roots living on pebbles that soon became exhausted. They have reached out now, and found a bit of fresh nutrient. But still need to grow some more, before they look better.

I have seen this in flood/drain to. Rash just like this. It's quite typical looking to me.

You say they are mums, so I would uproot them now and get them in compost or coco. Forget dripping in stones. I can already see nutrient salt build up on the pebbles. Get out while you can. It's an illogical system.

 

DrDee

Member

• Apr 2, 2019

• #9

...could be Mg related. Are you supplementing with calmag or epsom salts?
JD