is this a deficiency or toxicity ?

S

Sergeantspangle

New Member
What is your e.c, p.h, nute producer, how much/often are you feeding, appears to be hydrocorn is that your medium? At least need this info to help. Cheers
 
M

Mahawka

Active Member
This plant was started as a clone. The seller told me it's a grapefruit cheese.
New growth is showing similar problems on the first 3mm on the tip. Lower foliage is worst.

My environment.

Temp - 70 to 79 degrees.
Method - DWC
PH - constant 5.8 (reliable)
Nutrient - Lucas formula ~950ppm
Lights - HLG 260 v2 , 18 on 6 off
 
S

Sergeantspangle

New Member
If you are using tap water your cal mag will prob be fine. But I would say your mix is too rich I go by e.c and would have it no higher than 1 in veg and 1.8 flower otherwise you will risk toxic salts. I would rather risk a flush of everything than a build up of salts.
 
M

Mahawka

Active Member
Sergeantspangle said:
If you are using tap water your cal mag will prob be fine. But I would say your mix is too rich I go by e.c and would have it no higher than 1 in veg and 1.8 flower otherwise you will risk toxic salts. I would rather risk a flush of everything than a build up of salts.
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Thanks for your great advice. I will slowly bring down the EC to 1 in the next few days. I will report back in a week.
 
BBbubblegum

BBbubblegum

Well-Known Member
Post a picture of the whole plant please. Your pH is perfect and i have a feeling the ppms were just a little too concentrated of something. Looks like N or Calmag
 
BBbubblegum

BBbubblegum

Well-Known Member
Mahawka said:
Thanks for your reply. I have 2 photos for you here. Let me know if you require more specific pics.
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She looks good but I don't go over 600 ppm around that age. I use General Hydroponics at 5.8pH. In veg like that you can even go to 6.1 for better Nitrogen uptake while having a lower nutrient concentration, but 5.8 is fine
 
M

Mahawka

Active Member
BBbubblegum said:
She looks good but I don't go over 600 ppm around that age. I use General Hydroponics at 5.8pH. In veg like that you can even go to 6.1 for better Nitrogen uptake while having a lower nutrient concentration, but 5.8 is fine
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Great thanks for your reply. I have lowered my ppm to 650. I will get it down to 600 tomorrow. Do you think I have been experiencing nutrient lock out due to high ppm ?
 
BBbubblegum

BBbubblegum

Well-Known Member
Mahawka said:
Great thanks for your reply. I have lowered my ppm to 650. I will get it down to 600 tomorrow. Do you think I have been experiencing nutrient lock out due to high ppm ?
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Excess of nitrogen can lockout other nutrients such as Calcium. How are they lookin?
 
B

Blitz35

Well-Known Member
BBbubblegum said:
Excess of nitrogen can lockout other nutrients such as Calcium. How are they lookin?
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Excess nitrogen will not affect other elements! It can hurt sulfur's uptake, but besides that, it won't hurt the rest as most of these bottled nutrients contain a nitrate form of nitrogen, not ammoniacal.
 
M

Mahawka

Active Member
Hey all, just a quick update. The plant is growing well. The new foliage is looking pristine. However, some of the older foliage is still experiencing and having the same problem. They are slowly getting worse.
 
Sobeit

Sobeit

Member
Mahawka said:
Hey all, just a quick update. The plant is growing well. The new foliage is looking pristine. However, some of the older foliage is still experiencing and having the same problem. They are slowly getting worse.
Click to expand...
Usually severely affected leaves won't recover, would be best to remove them.
 
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